john_pyle1 Posted February 1, 2006 Share Posted February 1, 2006 Thanks to all who responded to my previous post. Great info and as you can see helped out a lot. This picture was made at f/10 and 150th of a second with canon 20d IS, USM on tripod at 7pm here in Georgia, USA. Is this the best I can expect or should it be even better. ISO was at 100 and white balance set to daylight with partial metering. Thanks, John Link to comment Share on other sites More sharing options...
andrew robertson Posted February 1, 2006 Share Posted February 1, 2006 If you want it any larger, I'd use a longer lens or a teleconverter. Link to comment Share on other sites More sharing options...
taylor_j. Posted February 1, 2006 Share Posted February 1, 2006 Head over to cloudynights.com forums, they have some great astrophotographers that can give you the advice you need right away.<br>But for now, I would slow down your shutter speed just a tad more if you want it slightly brighter...<br>A big thing in the astronomy world is using a moon filter with our telescopes, which I believe would be equivalent to a neutral density filter for a camera lens. We use them in our telescopes as the moon becomes too bright to enjoy, so the filter brings out more of the crater detail, hope this helps. Link to comment Share on other sites More sharing options...
bobatkins Posted February 1, 2006 Share Posted February 1, 2006 With a 200mm lens I don't think you're going to do a lot better. You might want to open up another stop to make it a bit brighter. Link to comment Share on other sites More sharing options...
mendel_leisk Posted February 1, 2006 Share Posted February 1, 2006 John, what was the focal length of your lens again? And is that full frame? And were you shooting raw? Regarding composition: maybe accept that if you can't fill the frame (due to focal length), aim for a composition where the moon is just part of a larger scene? BTW, you could just add this to previous thread. Link to comment Share on other sites More sharing options...
SCL Posted February 1, 2006 Share Posted February 1, 2006 I would go for more contrast. Also I would increase the ISO to 200, turn off the metering and rely on manual exposure. Although I usually shoot the 1/2 (gibbous?) moon, there is much more light allowing a shorter exposure. I thought your picture was underexposed by about 1 f stop. Keep working at it....that's what is nice about a digital....you can bracket 3-4 shots and almost instantly tell your best exposure. If you are shooting when the moon is too near the horizon, you will have greater atmospheric haze to go thru which generally reduces contrast, so make sure to shoot when you have the least amount of interference. Link to comment Share on other sites More sharing options...
bobatkins Posted February 1, 2006 Share Posted February 1, 2006 Your lens just isn't long enough<div></div> Link to comment Share on other sites More sharing options...
bennyboy Posted February 2, 2006 Share Posted February 2, 2006 1000mm lens, or 1000mm effective FOV Bob? Link to comment Share on other sites More sharing options...
robert_m3 Posted February 2, 2006 Share Posted February 2, 2006 Focus is just off making for an image without much contrast. You can try using a hartman mask to get critical focus. Basically make a cover for your lens with two circles cut out. When you're out of focus you'll get two offset images. When the images are completely merged you've got good focus. Link to comment Share on other sites More sharing options...
gary_jean1 Posted February 2, 2006 Share Posted February 2, 2006 Looks out of focus and under-exposed. Keep trying! ;-) Link to comment Share on other sites More sharing options...
antony_bichon Posted February 2, 2006 Share Posted February 2, 2006 Yes I would agree that you're a bit under-exposed. Switch to manual and use the f/16 rule with 1.5 or 2 of overexposure (adjust to taste). So at ISO 100, and exposure time set at 1/100th, set your aperture at f/9 (try even f/8). And yes, your lens is a bit short. Even 300mm is a bit short. Indeed keep trying, it's digital after all! Link to comment Share on other sites More sharing options...
erik_p1 Posted February 4, 2006 Share Posted February 4, 2006 Here is my example 20D 75-300is at 270, f11 1/125 iso100 100% crop and the full frame. Link to comment Share on other sites More sharing options...
erik_p1 Posted February 4, 2006 Share Posted February 4, 2006 full frame --- Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now