200mm f/2.8



http://www.dailyastronomy.com/story.asp?ID=181311&Title=Amateur+Astronomer+Disco\
vers+Comet+with+Digital+SLR



http://www.aaa.org/index1.aspx?BD=9765



The lower the f/ the better.



Carey





> To: Comet-Images@yahoogroups.com
> From: tricks46@...
> Date: Wed, 8 Jul 2009 12:41:00 +0000
> Subject: [Comet-Images] Faint Comets & DSLR
>
> Hello. Well my TV127is has been sent back to the maker to correct the optics
which have been off I think sence I bought the scope. This has cause me to only
be able to use 1/2 of the chip when imaging. Very strange. In the time untill it
returns I am setting a DSLR on the mount. I have a 35/70 zoom and a 100/300 zoom
lense. Can anyone give opinion of which or what power to use if I were to search
for or images faint comets now known or unknown? I have never searched for new
object but there could be a green smudge show up. Any input on time of exp.,
power of lense used problems to look for, anything.
> Contact on list or in private.
> Thanks
> Mike H.
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

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