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11-29-2014, 10:10 AM   #1
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25mm vs. 28-45mm for night photography

I'm wondering if anyone has done a comparison between these two lenses for night photography (particularly Milky Way images).

1) How much coma is apparent in the corners?
2) How sharp are these lenses compared wide open?

I have the 25mm D FA, but was considering selling it for the 28-45 since its more versatile. I don't think I'd keep both lenses.

11-30-2014, 10:12 PM   #2
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I have not used it at night, but I did a comparison of the 25 VS the 28-45 and the zoom won hands down being sharper at every aperture and also corners on the 25 are not good at any aperture.
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12-15-2014, 08:56 AM   #3
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Giving this one a bump to see if anyone else has some experience on this front
12-16-2014, 03:46 AM   #4
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I will be taking some with the 28-45 over my xmas break and am happy to share raws if you like.

12-16-2014, 07:29 AM   #5
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QuoteOriginally posted by 2351HD Quote
I will be taking some with the 28-45 over my xmas break and am happy to share raws if you like.
That would be very much appriciated!
12-17-2014, 02:58 AM   #6
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QuoteOriginally posted by 2351HD Quote
I will be taking some with the 28-45 over my xmas break and am happy to share raws if you like.
If it's not too much of a burden, but could you also take shots with the lens hand-held with SR besides tripod? There are almost no, if any, Raw photos available for this lens, which I find surprising considering the price. If I were to drop that kind of cash on a lens, I'd like to at least know what it's capable of.

In all seriousness, someone should send a memo to Pentax to put at least 10 good looking Raws on the page for each lens showing them off in different scenarios.
12-18-2014, 05:47 PM   #7
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I have not tried the 28-45 lens . I own the DA 25mm coupled with the 645Z. Here is one example of a Astro Shot using the 25mm lens. Coming from the A35mm the 25mm has allot less Coma. https://500px.com/photo/90397909/chasing-stars-by-thomas-brown?from=user_library
12-20-2014, 01:17 AM   #8
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QuoteOriginally posted by Thomasbrowphoto Quote
I have not tried the 28-45 lens . I own the DA 25mm coupled with the 645Z. Here is one example of a Astro Shot using the 25mm lens. Coming from the A35mm the 25mm has allot less Coma. https://500px.com/photo/90397909/chasing-stars-by-thomas-brown?from=user_library
man that is lovely, Thomas!

12-20-2014, 01:34 AM   #9
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I'd go for the 25mm if you really need the 25mm. If the 28-45 is not wide enough. Also, with the japanese version of the 25mm, you have the option to go for full 645 from time to time if even 25mm und the 645D/Z is not wide enough - by using film.
12-20-2014, 01:53 AM   #10
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The 28-45mm is also more likely to have problems with flare, and vignetting at wider apertures.
12-20-2014, 02:38 AM   #11
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i haven't tried the zoom yet but have the 25 and it is an excellent performer.

here's what the light stars look like on the 25 btw:

Bridge Reflection
12-24-2014, 01:29 AM   #12
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How sharp are these lenses compared wide open?
12-24-2014, 10:55 AM   #13
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QuoteOriginally posted by noomclub Quote
How sharp are these lenses compared wide open?
wide open? what's that?
12-24-2014, 12:08 PM   #14
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how did a new member get banned and how did a banned member post? adam?
12-24-2014, 11:41 PM   #15
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QuoteOriginally posted by mikeSF Quote
i haven't tried the zoom yet but have the 25 and it is an excellent performer.

here's what the light stars look like on the 25 btw:

Bridge Reflection
Believe me, the zoom is sharper at any aperture specially on the edges. I tested them side by side.
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