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Small bore challenge: the Moon w/ 6" or less

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#376 james7ca

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Posted 04 March 2017 - 09:56 AM

Martin, thanks for the notice.

 

I used the color version of the IMX178, thus I don't think the "normal" rules apply for critical sampling. With the Bayer matrix I figure you need about 1.5X more scale to sample correctly. Thus, 12 x 1.5 is f/18 which is what I was trying to get.

 

As for the seeing, it was only about average (meaning not good, not particularly bad). However, this time of the year the early crescent moon is just about as high in the sky as it gets so that helps with these shots. Actually, the seeing when I took my shots using the C90 was actually a lot better...

 

  http://www.cloudynig...15#entry7738119


Edited by james7ca, 04 March 2017 - 10:00 AM.


#377 kattmann

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Posted 04 March 2017 - 06:08 PM

I just started viewing and imaging again after a 12 year hiatus. I've been practising with a 76mm refractor on a CG-5 Advance Pro mount. Last night I had time to set up the rig with a Nikon D5300 and its swivel screen. I am pleased with the results since the seeing was horrible along the coast in Goleta, California.

 

Three use-able frames stacked in AS!2. Curves adjusted in Photoshop.

 

I was trying to image the ridges in the mare areas and I did manage to get a hint of the folding in the Dorsa Smirnov ridge. Cyrillus Theophilus came out well too.

Next, get a larger aperture scope, either a C6 or C8 and ZWO camera.

 

march8x-moon.jpg



#378 MalVeauX

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Posted 05 March 2017 - 07:58 AM

Took a stab at the occultation of Aldebaran and the moon last night, along with some high magnification detail panels.

 

ASI178MC

Celestron C6

GSO 2.0x TC

 

Note: Can't figure out why this pattern is showing up in two images, it looks like a bayar matrix of some kind, it's in the video and didn't stack out and is present in everything. :(

 

Captured in RAW8 and binning 2x2. Maybe this had something to do with it? I normally capture in Mono8 and never get this. Was binning to get frame rate up to beat the seeing. Used RAW because I wanted to get the color of Aldebaran once it was time.

 

Aristoteles & Eudoxus (mostly I really like looking at the supreme long sharp shadows cast by the features around Montes Caucasus):

 

32879254390_8143fb4fff.jpg

 

Maurolycus & Stofler:

 

32879254830_149a651a7f.jpg

 

Rima Ariadaeus & Hyginus:

 

33106285012_4755571895.jpg

 

Occultation of Aldebaran (this is a mosaic of 5 panel for the moon itself, and another panel for Aldebaran around 11pm from Florida, right before it went behind the moon):

 

33106289582_a100240363_z.jpg

 

+++++++++++++++++++++++++++++++++

 

get.jpg get.jpg get.jpg get.jpg

 

Very best,


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#379 james7ca

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Posted 07 March 2017 - 10:24 AM

The impact crater Eratosthenes (right center) and the sunlit rim of Copernicus (left, below center).

Captured with a Celestron C6 and a QHY5III-178C camera on the evening of March 6, 2017. Approximate effective focal length 2700mm (1.8X barlow). Image acquisition Firecapture, image processing Autostakkert! (best 15% of 2000 frames), Registax (wavelet sharpening), and Photoshop CC2017.

Attached Thumbnails

  • Eratosthenes and the Rim of Copernicus (Small).jpg

Edited by james7ca, 07 March 2017 - 10:31 AM.

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#380 evan9162

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Posted 07 March 2017 - 10:59 PM

I literally got 15 minutes of clear skies last night.  That was just enough time to haul the VX6L outside, hook up my DSLR, and snap 60-something full resolution stills.  Just as I was hooking my ASI290mm up, the clouds rolled in, and that was that.

 

VX6L 6" F/8 newt, Canon T4i DSLR, GSO 2x ED barlow closely spaced to about 1.5x

 

moon-large_p_thm.jpg

 

Here's the full-res version

https://goo.gl/photo...R1rERwxTtUdGwu9


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#381 Jeff B

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Posted 13 March 2017 - 06:08 PM

It's amazing what you guys are doing with smaller apertures.

 

I'm just starting.  Used a SW 120ED, Canon 6D, 3 X barlow, single frame, some cropping and a little edge enhancement.  

 

Jeff

Attached Thumbnails

  • Img_0142 cropped.jpg

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#382 Augustus

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Posted 18 March 2017 - 07:31 AM

I figured out Registax. Here's my retry. Composite of 19 images. Taken with my Celestron NexStar 4SE and Logitech Quickcam Pro 5000.

 

moonmosaicfinal.png


Edited by Augustus, 18 March 2017 - 12:35 PM.

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#383 james7ca

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Posted 18 March 2017 - 05:38 PM

I figured out Registax. Here's my retry. Composite of 19 images. Taken with my Celestron NexStar 4SE and Logitech Quickcam Pro 5000.

That's showing a lot of dedication, given the composite and all. Kind of reminds me of some of my very early work using a Polaroid camera back in the days...

 

However, the image seems to have some odd tonal qualities and I wonder whether your exposure level is correct. It could be one of several issues (or a combination of more than one), maybe the camera, or the exposure/gain setting, a bit of focus, or something in the processing.

 

As always, keep up the effort and thanks for sharing.


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#384 MarkGregory

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Posted 18 March 2017 - 05:40 PM

Mare Fecunditatis (the Sea of Fertility) and the impact craters Langrenus (top) and the twin, rayed craters Messier & Messier B (lower left center).

 

Captured with a Celestron C6 and a QHY5III-178C camera on the evening of March 3, 2017. Approximate effective focal length 2700mm (1.8X barlow).

Image acquisition Firecapture, image processing Autostakkert! (best 20% of 2000 frames), Registax (wavelet sharpening), and Photoshop CC2017.

Great image. I feel like I am in a spacecraft looking out the window. Mark



#385 james7ca

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Posted 18 March 2017 - 05:59 PM

Mark, thanks.

 

It looks like my "good" weather has ended. Late winter and very early spring are generally some of the best times of the year for clear skies here in San Diego. But, just last week we seem to have entered into a weather pattern we call "May Gray" and "June Glum" -- except that it is only mid-March so the season may have started almost two months early. What this means is that for the next six months we may have VERY few clear nights, the coastal low clouds and fog come ashore just about at sunset (or sometimes in the mid-afternoon) and won't clear until the following morning (after sunrise). Looks like I will have to switch over to solar photography or travel out to the local mountains and/or desert.

 

As for my C6 (not that anyone asked, but I've been thinking about this lately) I believe that I got a fairly good one although I definitely need to work on the collimation (I've adjusted it before but I don't think it is totally right). That and I want to remove some smears and streaks that were left on the inside of the corrector plate at the factory (they are pretty bad). Given that I'm going to have to open up the optical tube I also think I will work on the anti-reflective flocking, particularly down by the primary mirror (the mirror baffle tube).

 

For the collimation I'm going to try using an artificial star at a pretty good distance (outside at night). It could be a while before I have any clear skies and then even with the sky clear it may be that the seeing will be so poor that all I'll see is a wobbling "ghost" of a diffraction pattern (that's usually what happens when I try to check the collimation on my scopes, even after hours of cool down).


Edited by james7ca, 19 March 2017 - 01:23 AM.


#386 evan9162

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Posted 19 March 2017 - 12:54 AM

It's amazing what you guys are doing with smaller apertures.

 

I'm just starting.  Used a SW 120ED, Canon 6D, 3 X barlow, single frame, some cropping and a little edge enhancement.  

 

Jeff

That's an excellent result for just starting out.  



#387 Augustus

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Posted 21 March 2017 - 05:17 PM

 

I figured out Registax. Here's my retry. Composite of 19 images. Taken with my Celestron NexStar 4SE and Logitech Quickcam Pro 5000.

That's showing a lot of dedication, given the composite and all. Kind of reminds me of some of my very early work using a Polaroid camera back in the days...

 

However, the image seems to have some odd tonal qualities and I wonder whether your exposure level is correct. It could be one of several issues (or a combination of more than one), maybe the camera, or the exposure/gain setting, a bit of focus, or something in the processing.

 

As always, keep up the effort and thanks for sharing.

 

Turns out that I had exposure/gain on full auto! I started using it manually recently. The next mosaic will be much better.



#388 james7ca

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Posted 02 April 2017 - 10:35 AM

The crescent moon on April 1, 2017 taken at the prime focus of a Tele Vue NP127is (660mm, f/5.2) with a ZWO ASI178MM camera and a Baader 610nm longpass filter (red). Best 20% of 2000 frames with Autostakkert! followed by wavelets in Registax and final tweaks in Photoshop CC2017. To conform to the posting guidelines the image has been reduced by 50% to fit within the 1200 pixel height limit.

 

The smaller detail crop shows the full resolution from the original, full-disk image.

 

Attached Thumbnails

  • Crescent Moon with NP127is and ZWO ASI178MM (Small).jpg
  • Crescent Moon Detail.jpg

Edited by james7ca, 02 April 2017 - 10:39 AM.

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#389 MalVeauX

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Posted 03 April 2017 - 06:50 PM

C6

ASI178MC

 

Mosaic:

 

33774398886_17f969b4bd.jpg

 

33774383296_bc04e13bc5.jpg

 

32971929664_5005f546bc.jpg

 

32971922684_fd5ff36411.jpg

 

Setup:

 

33765006916_b33f8d99be.jpg

 

Very best,


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#390 Bomber Bob

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Posted 04 April 2017 - 09:27 PM

1960 Swift 838 (Takahashi 50x700)

 

Swift 838 - Moon 20170402V04S01.jpg Swift 838 - Moon 20170402V05R01.jpg

 

Shot the videos SAT night with a new generic China-made 5MP digital imager, then processed with AS!2.6.8 (32-bit).


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#391 Tyson M

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Posted 04 April 2017 - 10:46 PM

First quarter moon, April 3rd. 

 

33691073692_cc79873b12_b.jpg21_51_33_g6_q6_RS6gimp by SolarT RM, on Flickr

Skywatcher Equinox 80mm / ASI224MC


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#392 james7ca

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Posted 06 April 2017 - 01:32 AM

Plato and the Alpine Valley taken on the evening of April 5, 2017 using a Celestron C6 (approx. f/18 with an Astro-Physics Convertible barlow) and a QHY5III-178C camera. Best 25% of 5000 frames with Autostakkert!, wavelet sharpening with Registax, and final tweaks in Photoshop CC2017.

 

The seeing conditions varied a lot and quite rapidly, ranging from good to fair with small jet aircraft passing near to the moon about every two minutes (I live almost directly under an airport flight path).

Attached Thumbnails

  • Plato and the Alpine Valley with C6 and QHY5III-178C.jpg

Edited by james7ca, 06 April 2017 - 02:21 AM.

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#393 james7ca

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Posted 06 April 2017 - 02:18 AM

Sunrise on the crater Copernicus taken on the evening of April 5, 2017 using a Celestron C6 (approx. f/18 with an Astro-Physics Convertible barlow) and a QHY5III-178C camera. Best 25% of 5000 frames with Autostakkert!, wavelet sharpening with Registax, and final tweaks in Photoshop CC2017.

Attached Thumbnails

  • Copernicus with C6 and QHY5III-178C.jpg

Edited by james7ca, 06 April 2017 - 02:21 AM.

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#394 MalVeauX

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Posted 07 April 2017 - 09:38 PM

Tonight:

 

Celestron C6

ASI174MM + GSO 2x Barlow

 

33903092255_01d051b51a.jpg

 

33903092695_da935cb66c.jpg

 

Very best,


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#395 SwissCheese

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Posted 11 April 2017 - 03:17 PM

A few pictures of the Moon taken with my 70 mm refractor.

 

For the first one, at the native focal length, the Moon just fits in the frame of the ZWO ASI 224.

 

The second one is part of a mosaic covering the whole Moon made using the Barlow lens. I stupidly changed the gain during acquisition of the different panels, and when composing the whole mosaic it does not look very good. But the single images are fine smile.gif

 

The last one is a single shot at Moon rise using the DSLR (native focal length, but I think the uploader shrunk the image).

 

get.jpg  get.jpg

 

DSC09181_cut_small.jpg


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#396 james7ca

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Posted 11 April 2017 - 10:26 PM

That moonrise shot is very nice.



#397 Tyson M

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Posted 13 April 2017 - 08:16 PM

All images taken during the first quarter moon like the previous posted image a few posts up.  The equipment used was the same, Skywatcher Equinox 80mm and ZWO ASI224MC

 

Theophilus, Cyrillus and Catharina on the left:

 

First quarter moon. Lunar "X" visible on the terminator on the right.

 

 

 

33559545420_2370d093e8_b.jpg22_39_55_lapl6_ap193gimpbrightest1 by SolarT RM, on Flickr

 

Maurolycus and Stofler left and right center of the image.

 

Lunar "x" on the right along the terminator

 

33944479995_3464f87f8c_b.jpg22_37_23_lapl6_ap165gimpbrightest by SolarT RM, on Flickr


Edited by Tyson M, 13 April 2017 - 08:28 PM.

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#398 james7ca

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Posted 13 April 2017 - 09:03 PM

Tyson, it looks like you've got some nice lunar images there, however, they seem a bit dark to me. They are also flipped horizontally, at least in terms of their "normal" orientation (however, I think that is subject to your own preference). Similarly, I guess you could have been going for a darker experience with the images. So, please take my comments merely as suggestions rather than as outright criticisms.

 

In any case, those appear to be very detailed for an 80mm scope.


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#399 Tyson M

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Posted 13 April 2017 - 09:09 PM

Thanks for the comments, I take no offence at all!

 

Darkness can be overcome, I can adjust the histogram to brighten them and I took lots of frames.Although, I did run with lower gain to reduce noise, combined with small aperture, they may be dark on some computer monitors at the expense at keeping noise to a minimum or blowing out craters. 

 

And yes, they do appear flipped horizontally. I will have a look at making the changes you suggest and see what I come up with. 

 

Yes, these are with a barlow, good seeing, lots of frames. I will repost another attempt.


Edited by Tyson M, 13 April 2017 - 10:31 PM.


#400 Tyson M

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Posted 13 April 2017 - 09:38 PM

I ran through my 3 panel mosaic with the 2x barlow through various processing techniques to reduce noise, get correct image orientation and brighten it up without overexposing the crater rims.

 

This is what I could come up with. Lunar X and V visible. 

 

Equinox 80mm / ASI224MC

 

33983323216_a6bb95ae60_k.jpg22_13_55_pipp_lapl4_ap26_stitchrs6RS6BU by SolarT RM, on Flickr


Edited by Tyson M, 13 April 2017 - 10:48 PM.

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