Loading...

Follow Stellar Neophyte Astronomy Blog | Eric Teske on Feedspot

Continue with Google
Continue with Facebook
or

Valid
I got this question from a reader and I thought I'd post it here as well in case it is helpful to anyone else:
I recently bought a Meade 285 at a Thrift Shop. It is missing the eyepiece. Could you provide me any specifications (i.e. diameters) or supply sources for replacement parts? I stumbled across your blog with searching. Thanks for any info you can provide.
Here is my response and photos to help with the description:

If you have the angled mirror pieces and everything and you just need the eyepiece itself, you can buy a wide variety that will work. You can buy any of the 1.25" barrel eyepieces, this is the most common type as well.

The physical diameter of the bottom of the chrome collar is 1.50" but the eyepiece barrel itself is 1.25". I've attached photos showing the eyepiece dimensions for the ones that came with my telescope, they are the Meade MH9mm and Meade MA25mm. 

The 9mm gets more magnification but is kinda cheap, and the 25mm is a great medium magnification that shows detail but still wide enough field of view that you can find your targets faster (locating it with wider view and then changing the eyepiece for a closer view). Like I said the 9mm that came with it was basically cheap plastic so I bought a Orion 8920 6mm Expanse Telescope Eyepiece (http://amzn.to/2Ea7QTX) that I really like.

Barrel diameter

Chrome collar outside dimensions

Eyepiece with chrome collar

Both eyepieces that came with my Meade 285

Read Full Article
  • Show original
  • .
  • Share
  • .
  • Favorite
  • .
  • Email
  • .
  • Add Tags 
The weather is not looking great for the "total super blue blood moon" lunar eclipse tomorrow morning in Indiana, but would it be visible under nicer conditions? TimeandDate.com provides eclipse calculations by location, so just type in your zip code and see what the eclipse will look like at different times. 

We’d hit 50% magnitude when the moon is about 6° above the horizon (similar to this photo from the April 4, 2015 lunar eclipse in Indiana), so you’d have to have a completely unobstructed view to the West to see it reach total redness as it slips under the horizon (washed out by the lighter sky as the sun rises on the opposite horizon). For reference, 3 fingers held at arms length is about 5° of elevation.

Photo from the April 4, 2015 lunar eclipse from Noblesville, IN


Read Full Article
  • Show original
  • .
  • Share
  • .
  • Favorite
  • .
  • Email
  • .
  • Add Tags 
I tried to catch the Orionid Meteor Shower last night, and while I saw about 3-4 with my own eyes, I didn't catch any in the camera. That's okay though! Because one of the best consolation prizes from a meteor hunt is the star trail photos you can make from stacking all your pics together. I took 400 individual photos, each 15 seconds long, between 9:45pm and 11:35pm last night. If you live in the Midwest like me, or anywhere near civilization really, you're bound to have an airplane muck up your star trails. While this isn't necessarily bad, sometimes it's interesting to see just how busy the sky is at night, it can distract from the beautiful swirl of the stars as the Earth turns.

Star trails before and after with some easy touch-ups
If you don't already know how to do star trails, check out the free software called StarStaX. In short, you can stack of bunch of individual photos to create star trails without doing one big long exposure, which is the traditional route. If you're a star trail purist, your 2 hour long exposure could be ruined by someone bumping the tripod or a car passing by with bright headlights. With star trail stacking, you can throw out or edit a frame here and there and it doesn't ruin the entire batch.

The way stacking works is the software keeps the brightest pixel from each image. It's the same as the Lighten blend option in Photoshop. So anything dark will be replaced with something lighter, and things that are bright stick around. If the stars are the brightest pixels in their pathway, their light is kept. If something is brighter like a plane or clouds, those pixels are kept instead.

We can take advantage of this to edit out the planes and other junk in the photos because making things dark is the same as erasing them, and we don't have to worry about filling the empty space because there are plenty of brighter pixels in the other photos that will take its place.

Here's an example of a frame I edited. I want to keep the stars, but someone turned on the porch light which made the side of the house bright yellow. I did a very rough selection in Photoshop and made this area darker, knowing it would be replaced by the lighter section of the house in the other images. 
Here's another individual image. I remove 2 light trails from planes in this image by just coloring black over them. Since the ambient sky background in other images is lighter than the black, I know that the lighter pixels will be kept and these black pixels will be thrown out anyway - so it's the same as erasing them. I don't even have to have sharp edges or straight lines, the stacking averages out everything around it and you won't see the erase marks at all. 
Here is the final image without planes. 400 images stacked, each 15 sec, ISO 800, f/4.0, 18mm. The image looks too yellow because of the light pollution in the area and in the neighborhood, so there's just a couple tweaks left to make in Photoshop. 
Here's my final product. Color balance and contrast is like cooking with spices, everyone will have their own taste. I like to go a little blue/purple to get rid of the gross yellow light - but not so purple that it looks like a disco blacklight party. I turned up the contrast a little bit to hide the yellow clouds that kinda smeared across the image, but again not too much because I don't want it to look completely fake. These 2 hour star trails are nice and long, and without the distracting planes, it looks much more peaceful. 

Well this really wasn't meant to be a tutorial, but I just wanted to document my process a little. Another star trail consolation prize to add to my collection, and a little bit of post processing work took it from neat to pretty cool.
Read Full Article
  • Show original
  • .
  • Share
  • .
  • Favorite
  • .
  • Email
  • .
  • Add Tags 
I know you're not supposed to look directly at the sun even through clouds, but it's so tempting when you step outside and see this eerie red sun glowing to the West through a layer of uniform clouds - especially when you've been seeing tweets all day about the huge active region (sun spots) on the face of the sun right now. What an easy opportunity to try to capture some sunspots and this weird red sun in a flat background of gray. I tried looking at it first with a pair of eclipse glasses, and couldn't see anything at all, so then I took a few sideways glances and set up my camera.

Single frame Canon T5i 300mm, ISO 100, f/8, 1/500 sec very minor contrast tweak in iPhoto otherwise straight from the camera. Active regions visible in the middle (sunspots). 

Chris and Zack said they could see the sunspots with the naked eye. Eeeeeeh! I wasn't going to stare at it long enough to try to see them, but I could clearly see them through my eyepiece on the camera.

My photo vs. NASA SOHO to show the labeled active regions. I played with curves and sharpness to try to bring them out a little bit more. Had to remind myself it's through clouds so it's not going to be super sharp, but WOW look at the size of those things!

I tried to get some context photos, and I've found that the DirectTV dish on the roof makes a convenient foreground target, and it's vaguely space-ey so I guess it works haha.

If you look closely you can see the sunspots even in this wider shot. Single frame with Canon T5i at 75mm, ISO 100, f/8, 1/500 sec

And yet another context shot, with my iPhone before I ran inside to get my tripod. I think this weird red sun through clouds beats out my eerie yellow sun from a few years ago. What do you think?

iPhone photo wide angle showing the sun in the sky with the solid gray clouds

I guess I had HDR turned on because the roofline has a glow around it, but this wasn't meant to be a cool iPhone photo of the sun just an example of the setting with the weird gray sky and red sun high in the sky. It's like the color of a sunset but much higher away from the horizon. The iPhone photo makes it look a little darker than it really was because I was trying to properly expose the sun.
Read Full Article
  • Show original
  • .
  • Share
  • .
  • Favorite
  • .
  • Email
  • .
  • Add Tags 
When Karin and I left Indianapolis for our solar eclipse excursion we saw the slim crescent moon just before sunrise. It was cool because it was like seeing the moon on its journey toward the sun. Now tonight I looked outside and saw the waxing crescent moon at sunset - the first crescent after the eclipse.

Waxing crescent moon, single frame Canon T5i, ISO 100, 120mm, f/4.5, 1/3 sec

I was supervising the dogs outside so they don't eat mushrooms growing in the mulch, and I noticed the golden crescent sliding between the houses to the West. I literally ran through my house grabbing my camera, tripod, and shutter release so I could go outside and take some quick photos. I felt re-energized. I feel like I haven't been as enthusiastic for take boring old moon photos lately, but this time felt like doing it for the first time.

Waxing crescent moon 6.4%, single frame Canon T5i, ISO 100, 230mm, f/5, 1.3 sec

I'm so glad I've had so many visitors to my blog this past couple months gearing up for the eclipse. I also got a few direct emails asking my opinion of different solar filters and eclipse glasses. It's really nice to hear from people who come check out my site!
Read Full Article
  • Show original
  • .
  • Share
  • .
  • Favorite
  • .
  • Email
  • .
  • Add Tags 
I saw the Great American Eclipse on Monday, August 21, 2017 from St. Joseph, Missouri. I saw totality, the total phase of the eclipse, for a fleeting 10 seconds in a lucky break in the clouds during otherwise overcast and even rainy skies. The location experienced 2 minutes and 38 seconds of totality, which I felt and observed in the change in ambient light and glowing orange horizon, but only about 10 seconds standing in awe, eyes to the alien black hole in the sky. I wanted to write this longer post to get my recollection of the event down into text because I think it's the kind of thing I'll want to revisit later.

I love this photo, it really captures the day and the atmosphere at the event

On Monday, August 20 my sister Karin and I set out from Indianapolis, IN at 6:30am ET and although it was early, the time passed quickly on our way to the Gateway Arch in St. Louis. I had never been to St. Louis before, never seen the Arch in person. This was going to be something of a consolation prize because we were already watching the pessimistic weather forecasts coming out of NW Missouri. I kept telling myself, at least I will have done something new and experienced something that would make the trip worthwhile, even if I didn't see ANY of the eclipse.

Had to touch the actual arch to say I did. We didn't go inside because it was a 3 hour wait to the top.

The arch was very cool, felt like a mix between the Washington Monument and an alien spaceship

We continued on to Kansas City, the location of our hotel. I chose a hotel by the Kansas City airport inside the path of totality, thinking that even if traffic was so apocalyptic that we literally don't make it out of the parking lot, we would still experience totality. We got to the hotel and saw license plates from Minnesota to Washington to Texas, and saw a couple guys testing out solar filters on DSLR cameras in the parking lot on our way to dinner in Kansas (checking another state off the list).

Not the mad rush I was expecting in the hotel parking lot at 5:30am, traffic was a breeze actually. We parked facing out right by the exit as to make a quick get-away if needed. 

The plan was to wake up at 5am and be on the road to St. Joseph by 5:30am to beat the rush. We woke up to crickets chirping and a clear sky with stars overhead, but no crowds of people. I guess we beat the traffic, and I guess a few people had canceled their hotel rooms (I overhead the employees discussing as we were checking in). Either way, we had clear skies and we were on our way to the event at Rosecrans Memorial Airport.

Just about all roads west of St. Louis included these solar eclipse traffic warnings

We passed flashing LED construction signs every 2 miles or so warning of anticipated traffic delays due to the solar eclipse, one that said "SOLAR ECLIPSE AUG 21 HEADLIGHTS ON," and clever traffic safety signs that read "ECLIPSE YOUR PHONE, JUST DRIVE," all along the path of totality.

Snapchat had fun solar eclipse geo filters all along the path of totality

We got to the airport among the first hundred cars or so parking for the day. A number of campers and media vans were already there from the days before, and we followed a winding dirt road through the restricted part of the airport. The restricted area signs were covered with hand made posterboard signs directing traffic forward. Volunteers in orange shirts were stationed at each fork in the road making sure we didn't end up on a runway. It looked like we actually drove down an out-of-use runway for a portion of the route.

Sunrise at Rosecrans Memorial Airport morning August 21, 2017

We got to the parking field and felt lucky to have an SUV to drive along the grass. Port-o-potties were stationed every 200 feet or so and doubled as parking area signs. We were by P-2 which apparently was hilarious to everyone in line for the toilet because everyone kept making stupid jokes like "P-2, do we have to pick?" and "They should call it a 'U Can' then it could be 'u can pee 2' get it?" (eye roll) all part of the experience!

Hill between the food trucks and parking field

Clouds can't make up their mind, but the sun was a welcome sight

Finally got to put the eclipse glasses to good use on the partial eclipse leading up to totality, before the wave of rain clouds rolled in.

The crowd was an interesting group. I was trying to figure out how to describe them. It was like a combination of people who didn't necessarily seem that into astronomy but were just up for doing stuff, like "might as well" drive down to see the eclipse. There were a fair number of dads in eclipse shirts and strap on sandals, retirees, bucket-listers, families with huge cruising vans and 4 teenagers, and then a few more extreme observers with fancy auto-guided rigs and telescopes set up in the grass. It was like a music fest without the music, or I guess like an astronomy club meeting on steroids.

Row of eclipse tailgaters and some of the nicer telescopes I saw at the event

The guy parked next to us was by himself, his name was either Christo or Christoff and he was originally from South Africa but living in the Netherlands. He said he flew in just for the eclipse and was flying out again the next morning. He said it was a bucket list item, and that he also wanted to see the Northern Lights one day, but that he wasn't necessarily an astronomy buff. He had a great attitude about the possibility of cloudy skies, and he kept saying "thaaats naature I guess" in a South African accent.

Waiting for the sun to poke through the clouds

You can tell by the lens flare that the eclipse hasn't started yet, but I'm testing out my filter and practicing trying to focus

We set up our tailgate in front of the car facing the sunrise to the East NE. Just about everyone set up chairs and tents outside their car like a tailgate, rather than going over to the designated viewing area. This meant that cars were basically trapped in their rows and it would be difficult to leave if anyone wanted to leave. Only 1 or 2 cars ended up leaving down our row before the eclipse, presumably chasing better conditions. Medics and police patrolled up and down the rows in Gator carts and could easily maneuver the tents and tables.

Eclipse tailgate

Sun trying to poke through the clouds

There's still hope! A patch of blue sky!

We ventured over to the food trucks and to take in the crowd, do some people watching, before heading back and setting up the camera in time for the partial phase of the eclipse to begin. It was cloudy right when it started, but the clouds were moving quick and we would see the Pac Man sun through the clouds and got to observe it with our eclipse glasses and I got as many pictures as I could!

Partial phase sequence through the clouds, last photo (12:06pm) exactly 1 hour prior to totality



After getting some photos of the partial eclipse, the clouds really rolled in, and we heard thunder coming from the NW. Great! At this point we start rationalizing our disappointment. "Well, at least we can say we were in the path of totality. At least it should still get dark, so we can experience that." It started raining for real and we got back in the car with everything packed up. Christoff our parking lot neighbor was listening to live coverage on the radio, and I took some photos of the rain 15 minutes before totality to document the lousy weather.

Feeling very distressed a few minutes before totality! Photo from 12:50pm with totality coming up at 1:06pm.

My sister and I agreed that for totality we would stand outside the car even if it was raining so we could really experience it. We'd read about listening for crickets and watching the sky darken even if it's cloudy. It was still sprinkling when we got out of the car and stood under the tailgate. I put my iPhone on a small tripod to film the ambient changes and record our reaction to totality.

Darkness at Totality and Crowd Reaction in St. Joseph August 21, 2017 - YouTube


The video speaks for itself, but we saw through the clouds not a thumbnail crescent sun, but an eyelash sun, just a thin line of burning white light through the clouds. It was so tantalizing and tempting to look at it without eclipse glasses. We dared a few peeks through the clouds and tried to watch with our glasses on when it got too bright. I didn't dare get my camera out because I didn't want to miss a chance to see something through holes in the clouds. Actually, holes might be a bit generous, it was more like thin spots in the clouds. It was solid overcast.

On our drive out of Missouri we saw these weird clouds. Karin looked them up and they are called mammatus clouds (as in mammary) and they are supposedly pretty rare, and usually associated with extreme weather.

It got dimmer and we looked to the West to see what looked like sunset approaching. The sky on the western horizon was first to turn orange, and then rather quickly the rest of the sky got dark too. Not just a little dark. DARK. Probably exaggerated even more so by the overcast sky. The orange alien glow was on all horizons and the clouds overhead were purple and wispy light blue/green. The darkness itself was bizarre enough to make the trip worthwhile to be on the line of totality, but then in a break in the clouds I saw something. I saw a solid edge and thought that was too clean a line to be from the clouds itself, and an instant later the total eclipse revealed itself. First through a thin wisp of clouds that were moving, and then almost completely revealed (or very very thin clouds).

Compare a few minutes before totality to the darkness of totality, screenshots from the iPhone video above

The total eclipse was light blue through the thin clouds, and white corona clearly visible around a black sphere. It looked like an artist rendering of a black hole with some sense of depth and volume and spitting out etherial white flames. It back lit the clouds around it like a full moon, and stood starring back at us in silence. I thought I had seen it for about 7 seconds, but then watching the video I believe it must have been longer. I found other videos on Instagram tagged at that location and it could have been 10-15 seconds easily.

The first thing I remember when it went back behind the clouds was that it looked different than any photo I had ever seen of it. Because of the clouds, I think it validated for me that this wasn't a false memory, I wasn't just remembering other photos I'd seen and convincing myself I'd seen it, I felt like I had proof in my mind that I had really seen it. Every photo I've seen has the stark white contrast, but this had a blue/green glow from the clouds and the white corona stood out against the clean line of the moon. It felt so unnatural, it looked like an alien spaceship, in my mind it seemed almost egg shaped which is probably my memory already distorting my experience or maybe an artifact of the shape of the hole in the clouds, it's hard to say but I remember thinking that it was "O" shaped and not a sphere for some reason. Maybe just my irrational mind overwhelmed by what I was looking at.

When the lights came back on, we again saw the eyelash thin sun coming out from behind the moon. I decided to get my camera and try to get some photos, sort of regretting not already having my camera on auto pilot snapping photos during totality - but then again it was raining just 10 minutes before. I watched with eclipse glasses a few more minutes, and then managed to snag some photos of the crescent sun appearing through the clouds. It was hard to find good exposure because the thickness of the clouds was constantly changing.

Crescent sun after totality (1:17pm) ISO 100, 300mm, f/7.1, 1/2500

I like these photos because..
Read Full Article
  • Show original
  • .
  • Share
  • .
  • Favorite
  • .
  • Email
  • .
  • Add Tags 
I'm getting anxious, I'm packing tonight and then going into work until about midnight, and then hitting the road with my sister at 6am tomorrow morning. Driving from Indianapolis to Kansas City, spending the night and making sure battery packs are charged up, and then driving to St. Joseph bright and early for the gates to open at the viewing location at 6am Monday.

My gear, packing light with just the DSLR tripod, tool kit full of batteries various do-hickeys, tape, cardboard, my home made solar filter, welding glasses, solar binoculars, and eclipse glasses. Not pictured: Coolers, lawn chairs, blankets, bottled water. 

It feels bizarre to be packing both sun screen and a poncho! The weather forecast is all over the place for NW Missouri, and I have to keep reminding myself that worst case scenario I don't see the sun at all, it will still get super dark in the middle of the day, and that's part of the experience. The event is more than just observing the sun, we'll be part of a mass migration following a celestial event - so that's my consolation prize if we don't see the sun at all.

Cloud cover forecast as of today. Hoping for thin clouds or plenty of holes!

If it's partly cloudy, I'd like to at least get some photos of the eclipsed sun at any stage. I've been looking up eclipse photos through clouds and they actually make the eclipse more interesting in terms of photo composition, so I'll definitely take what I can get!

Didn't even realize the brand of car gum I've been using for years is eclipse gum, heh heh, I wonder if they are planning some big ad campaign or something

Read Full Article
  • Show original
  • .
  • Share
  • .
  • Favorite
  • .
  • Email
  • .
  • Add Tags 
I thought this was newsworthy! A commenter on one of my most popular blog posts of all time "$10 DIY Solar Filter for DSLR Camera" pointed out that the solar filter I link to was being sold on Amazon for a huge markup! I noticed that just a few days ago the 4"x4" solar filter was out of stock, but it looks opportunist are swooping in to flip these unavailable items at astronomical rates as third party Amazon sellers. Eclipse glasses, only $3.54 on July 24, are offered at $69.95, that's an 1876% increase!!

Price trends from Honey plugin for Chrome

I use the Chrome plugin called Honey to get price graphs for the items on Amazon that show obvious trends upward as the Great American Eclipse approaches. 

Not just eclipse glasses, but the solar filter I recommend in my blog post is no longer $7.35, it's now being offered by a third party seller for $134.85 (that's a 1735% increase!). 

Price trends from Honey plugin for Chrome

This is making me a little worried. I have all my gear already, but it could be the early signs of what the BIG DAY is going to be like. I'm picturing myself out on the road trying to get food, water, bathrooms, all being at the mercy of supply and demand. If tens of thousands of eclipse viewers are going to be descending upon little towns, gas stations, and rest stops all across America - who could blame them for getting the most they can out of it, knowing it's unlikely these 1-day tourists become regular visitors. 

I guess all we can do is wait and see. As for the stuff on Amazon, there are plenty of alternatives - you don't need THAT pair of eclipse glasses, and I know that the black polymer filter comes in different sized sheets (that are also marked up, but not as bad). Stay safe out there, and remember to take in the full experience - possibly including the over priced goods along the way! It just adds to the story of the event that you can tell your friends and family years from now. 
Read Full Article
  • Show original
  • .
  • Share
  • .
  • Favorite
  • .
  • Email
  • .
  • Add Tags 
I just received my Celestron 10x25 solar eclipse binoculars in the mail from Amazon. I must have ordered these last minute solar observing eclipse binoculars at just the right time, because now they are saying "usually ships within 1-2 months" on Amazon. I got mine in 2 days. Are they really out? No idea, I got mine, if you want to order some before the big day you might want to look around quickly! I ordered these because I knew in the time leading up to totality I would want to play with more than just some cardboard eclipse glasses.


They are listed as a best seller on Amazon, perfect size for under $40

I think these 10x25 binoculars will give me a good view. Hopefully there is something interesting like a sunspot on the sun that day, because you can indeed see large sunspots with these binoculars. I spotted one just yesterday that looked like a little black freckle on the sun. Here are some photos of my eclipse binoculars unboxing. It's a little weird at first, pointing binoculars toward the sun. I'm glad these solar filters on the ends are NOT removable, just in case!

 


The shiny black surface is cool and reflective. These will come in handy for more than just the eclipse, as I mentioned you can absolutely use them to see large sunspots too.


The color of the sun through the binoculars is a pleasing yellow/orange, it looks very natural - not that I can really stare at the sun to compare.



Bigger isn't always better with binoculars. I like that these will fit in my pocket, or even (gasp) on my belt because of the handy belt-loop on the case. Oh my, I would be the most fashionable at the solar eclipse viewing party.



The first number (10) in "10x25" means the magnification, or how many times closer an object will appear compared to the naked eye - so these are 10x meaning the sun will appear 10x closer. The second number (25) in "10x25" is the diameter of the objective lens (bigger lens on the front) so the lens is only 2.5 cm across. This would be no good for viewing the night sky, with such a small light-gathering diameter, but for the sun it's no big deal. Bigger objective lenses are bigger light-catching buckets, and images will appear brighter - since this isn't important for daytime viewing of the sun, I'll trade size for portability. These 10x binoculars actually provide more magnification than my 7x50 binoculars I got for observing the moon and stars, even though they are much smaller.
Read Full Article
  • Show original
  • .
  • Share
  • .
  • Favorite
  • .
  • Email
  • .
  • Add Tags 

Separate tags by commas
To access this feature, please upgrade your account.
Start your free month
Free Preview