ASTRO: NGC4490 and NGC4485 binned 2x2 unfiltered

this is 100 minutes (10 x 10 minutes binned 2x2)

http://www.narrowbandimaging.com/ngc...r_2x2_page.htm

seeing wasn't very good so that's why I binned and ran at about 0.86
arc-sec/pixel

Richard Crisp wrote:

this is 100 minutes (10 x 10 minutes binned 2x2)

http://www.narrowbandimaging.com/ngc...r_2x2_page.htm

seeing wasn't very good so that's why I binned and ran at about 0.86
arc-sec/pixel

Better than I did last night. Everything was a total loss. High clouds
fogged around stars something awful, seeing was 5" and then the rain
started.

Tonight it is nice and clear but seeing is no better. Still can't find
any hint of a focus point. Just running with the readings from when
seeing was better and seem to be getting something.

Found out my "Eyes" shot in the chain was lost to my frost problem and
beyond recovery. But that was before I had some gradient tools so will
try again on them. More likely I'll have to retake them.

Where's a mountain top with laminar air flow when you need one?

Rick

--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

Richard,

0.86 arc-sec/pixel is certainly enough to get good detail, so it was
probably a good idea to bin. This is an interesting pair.

Stefan


"Richard Crisp" schrieb im Newsbeitrag
et...
this is 100 minutes (10 x 10 minutes binned 2x2)

http://www.narrowbandimaging.com/ngc...r_2x2_page.htm

seeing wasn't very good so that's why I binned and ran at about 0.86
arc-sec/pixel

the interesting thing about that image scale Stefan is that I can get almost
the exact same image scale with my Dream Machine used at 5760mm (24x24
micron pixels using the cassegrain with no reducer) versus the 6.8 micron
pixels binned 2x2 wtih the reducer at 3366mm

that gives me the chance to do some rather detailed comparisons of the
performance of the two cameras.

I could literally spend the next year doing nothing but experiments and
science and still not finish up....


"Stefan Lilge" wrote in message
...
Richard,

0.86 arc-sec/pixel is certainly enough to get good detail, so it was
probably a good idea to bin. This is an interesting pair.

Stefan


"Richard Crisp" schrieb im Newsbeitrag
et...
this is 100 minutes (10 x 10 minutes binned 2x2)

http://www.narrowbandimaging.com/ngc...r_2x2_page.htm

seeing wasn't very good so that's why I binned and ran at about 0.86
arc-sec/pixel