Search found 76 matches

by donstim
Thu Jul 02, 2020 1:02 am
Forum: Gallery
Topic: Effect of L-eNhance Filter -- M27
Replies: 10
Views: 194

Re: Effect of L-eNhance Filter -- M27

Thanks Chris. I had just made a fairly lengthy post, but it seems to have disappeared into the ether. I agree that the native driver uses 50/50, but the camera SDK appears to use 52/95 (or 50/90). When using SharpCap or FireCap, there is no need to install any ZWO camera driver. It really doesn't ha...
by donstim
Wed Jul 01, 2020 9:19 pm
Forum: Gallery
Topic: Effect of L-eNhance Filter -- M27
Replies: 10
Views: 194

Re: Effect of L-eNhance Filter -- M27

That's funny. I deleted by default 294MC Pro initialization file in SharpCap, restarted it, and it showed 50/50. Just to make sure, I downloaded FireCapture, installed it new, and it also shows 50/50. I don't know if it matters, but which version of the ZWO camera driver are you using? I have been u...
by donstim
Wed Jul 01, 2020 7:01 pm
Forum: Gallery
Topic: Effect of L-eNhance Filter -- M27
Replies: 10
Views: 194

Re: Effect of L-eNhance Filter -- M27

Thanks guys for the discussion. In response to your first post, Bruce, I am basically doing EAA with a little post-processing. I save the stack from SharpCap "with adjustments," not the individual FITS files. All the adjustments I make in SharpCap are with the sliders in the livestack window, not fr...
by donstim
Tue Jun 30, 2020 5:08 pm
Forum: Gallery
Topic: Effect of L-eNhance Filter -- M27
Replies: 10
Views: 194

Effect of L-eNhance Filter -- M27

Here is a comparison of an M27 I captured a couple of nights ago using an L-eNhance filter: https://photos.app.goo.gl/eHH4iqvu2VYspsZJ9 compared to one I took last year without any filters: https://photos.app.goo.gl/p5Bg71fwemb4pTR2A Both were taken with a Celestron Evolution 8 with a Celestron 0.63...
by donstim
Thu Jun 25, 2020 8:57 pm
Forum: Deep Sky Imaging
Topic: ZWO294 MC Pro best gain
Replies: 5
Views: 154

Re: ZWO294 MC Pro best gain

Hi Joe, I also practice EAA rather than long exposure astrophotography. With a Celestron 8-inch and 0.63x reducer/corrector, SharpCap's Brain usually recommends 121 gain , brightness 4, and 10-20 second exposures in my Bortle 6+ skies. That seems to work well for me. If I use a filter like the L-eNh...
by donstim
Wed Jun 24, 2020 1:02 am
Forum: How do I?
Topic: Smart Histogram always way too dark, no matter what
Replies: 37
Views: 491

Re: Smart Histogram always way too dark, no matter what

Menlo, I think (hope?) you have your answer. The Brain's suggested max dynamic range exposure/gain settings (for the measured sky brightness, camera sensor analysis, min/max exposure limits, and desired read noise limit) will give you the best dynamic range in a stacked image. It assumes you will be...
by donstim
Mon Jun 22, 2020 4:03 am
Forum: How do I?
Topic: Smart Histogram always way too dark, no matter what
Replies: 37
Views: 491

Re: Smart Histogram always way too dark, no matter what

I don't have the same camera you do, so can't comment directly on the Brain's suggested gain/exposure/brightness settings other than it has picked the gain where the read noise has a sudden "step" dropoff and so corresponds with the highest dynamic range, lowest read noise gain for your camera. (You...
by donstim
Sat Jun 20, 2020 11:01 pm
Forum: How do I?
Topic: Smart Histogram always way too dark, no matter what
Replies: 37
Views: 491

Re: Smart Histogram always way too dark, no matter what

Frankly, I don't see anyone directly responding to Menno's question, which as I understand it is, why, when he uses the settings recommended by the Brain tool, are the resulting images so dark as to be completely unusable? I am sure he understands he can use any gain/exposure/brightness settings tha...
by donstim
Fri Jun 19, 2020 8:18 am
Forum: Live Stacking
Topic: Sigma Clipping setting during Live Stacking
Replies: 10
Views: 532

Re: Sigma Clipping setting during Live Stacking

No, sorry I did not. Next time!

Don
by donstim
Wed Jun 17, 2020 11:55 pm
Forum: Live Stacking
Topic: Sigma Clipping setting during Live Stacking
Replies: 10
Views: 532

Re: Sigma Clipping setting during Live Stacking

I've been unable to prevent satellite streaks during live stacking. Last night I got several streaks before sigma clipping had a chance to build its calibration. So, I cleared the stack then got a streak after the 10 frames had been acquired. Essentially no pixels rejected (maybe 0.0001%). ZWO ASI 2...