Re: [APML] OT: M109, NGC 2403 and other collaboration images

[Duncan Munro <dmunro@sfu.ca>]

Greg , hi.   I look at Jim Misti's images and I see a challenge, in 
several ways.  For starters, even though he has a 32" scope he can still 
only resolve to the limits of seeing which does (or not?), 
theoretically, allow "mere mortals" like us to match his images, albeit 
with some difficulty.

for example 32" F7.2 + SBIG 1100 = 14.3x21.5 min FOV with .32 arc/sec 
pixels.

                   10" F10 + SBIG ST8= 12.6x18.9 min FOV with .74 
arc/sec pixels

both systems have a similiar FOV and both should resolve to the limit of 
seeing. I guess the question becomes: How close can a mortal using the 
above Meade compare to gods?  Could a very dedicated Meade 10" F10 user 
resolve to the same limits as a 32" F7.2?

2ndly, how close could I come using my 10" f6.3 at F4.4 and a lowly 
ST-7E?  10" F4.4 + ST7= 14.3x21.4 min FOV with  1.68 arc/sec pixels. 
Let's say I fly to Mauna Kea, and guide my scope to it's absolute 
limits. How close could I come to duplicating Jim's images, in terms of 
resolution and depth?

The last question is how close can film come to competing with CCDs? 
Could a well corrected 10 to 12" OTA using film match a 32" 7.2 using a 
large format CCD camera? Perhaps film could match it with stacked 
multiple images and continuously temperature adjusted focus?   How about 
a DSLR and a 10" OTA?

Finally, I could probably build a 25-30" f4 coma corrected newtonian 
with a  computerized 3 axis  mount for about the same cost (maybe a 
little cheaper) as all my existing equipment  so it's not really out of 
the question even for Joe LunchBuckets like me...

cheers

Duncan

http://www.sfu.ca/~dmunro/

Greg Hartke wrote:

> Hi, Rob,
>
> Very nice. I confess I look at these images and get a much different 
> reaction than I do to most, including the images you take. The reason? 
> No matter what happens, I'll never shoot through a 32" telescope. I 
> know... It sounds idiotic but it's still my reaction. As always, I 
> much preferred the galaxy shots. I could easily be wrong but the 
> nebulae looked to be sections of larger frames.
>
> I went to Jim Misti's web site and looked over his images. It was 
> interesting comparing his film images to his CCD images. In the 
> sampling I viewed, I thought the star colors were more muted in the 
> former. In addition, the stars seemed larger relative to those in the 
> CCD images. In general, I found the film images softer and less 
> satisfying than the CCD images. I was surprised to see red halos 
> around some of the brighter stars in his film images as I thought I 
> was the only one with that problem. I have a shot of M46 that I 
> thought was decent but seeing his makes me want to run away and hide. 
> I never saw the planetary looking like that before not to mention that 
> he might have captured the very faint central star. Again, the image 
> scale in concert with the light gathering power are far beyond 
> anything most mere mortals will ever use.
>
> Regards,
>
> Greg Hartke
> Sykesville, MD USA
>
> ----- Original Message ----- From: "Robert Gendler" 
> <robgendler@worldnet.att.net>
> To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> Sent: Wednesday, March 02, 2005 1:19 PM
> Subject: [APML] OT: M109, NGC 2403 and other collaboration images
>
>
>> Hi all,
>> Below are a new collection of collaboration images processed
>> by me and taken by Jim Misti. We hope you enjoy them.
>>
>> http://www.robgendlerastropics.com/M109.html
>> http://www.robgendlerastropics.com/NGC2403JM.html
>>
>>
>> http://www.robgendlerastropics.com/IC2177Close.html
>> http://www.robgendlerastropics.com/NGC1999.html
>> http://www.robgendlerastropics.com/NGC1333.html
>> http://www.robgendlerastropics.com/PK164.html
>> http://www.robgendlerastropics.com/NGC1788.html
>>
>>
>> Rob Gendler
>> email: robgendler@att.net
>> Web Site: http://www.robgendlerastropics.com 
>
>
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>
>

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