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05-16-2015, 07:37 PM   #1
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Best lens for 28mm?

I'd like to have some fast AF 28mm range lens. It can be prime, or zoom covering around 28mm. May be Pentax or third party. I do have manual 28 prime, but it's extremely difficult to focus manually, so I need AF.
What would be the best ratio money/IQ?

05-16-2015, 07:42 PM   #2
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Da21. The fa28 is cheaper, but not by much. The da21 is a better lens.
05-16-2015, 07:52 PM   #3
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F28 f2.8 is a stellar lens.

I bought it in lieu of a 31mm which now I have both.

I have the 21mm (and all the DA limited primes except the 35mm)... and the F28 is a pretty nice lens.

That focal length (28mm) is my favorite walk around focal length on a crop sensor. Around $200-$225 ish for the F28 and you won't be disappointed.

Very few lenses can hang with the 31mm but the F28mm definitely gets an honorable mention.

---------- Post added 05-16-15 at 09:55 PM ----------

QuoteOriginally posted by robthebloke Quote
Da21. The fa28 is cheaper, but not by much. The da21 is a better lens.
In my opinion the 21 and the 28mm are worlds apart.

One might say 'its only 7mm'... but on the low end of the spectrum 7mm is a HUGE amount. They are really just different lenses with different focal lengths.
05-16-2015, 07:57 PM   #4
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QuoteOriginally posted by micromacro Quote
I'd like to have some fast AF 28mm range lens. It can be prime, or zoom covering around 28mm. May be Pentax or third party. I do have manual 28 prime, but it's extremely difficult to focus manually, so I need AF.
What would be the best ratio money/IQ?
An older-generation Sigma 30mm F1.4 EX would be a good choice. The current model seems to be plagued by AF issues.


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05-16-2015, 07:57 PM   #5
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When you look in the lens database and see 31 separate individually tested lens reviews from 31 different people and you get an overall score of 9.4 out of 10.... that ain't too shabby right there.

SMC Pentax-F 28mm F2.8 Reviews - F Prime Lenses - Pentax Lens Reviews & Lens Database
05-16-2015, 08:07 PM   #6
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QuoteOriginally posted by Adam Quote
An older-generation Sigma 30mm F1.4 EX would be a good choice. The current model seems to be plagued by AF issues.
That's the one I'm thinking about as well. The price/IQ is pretty good.

I like F series Pentax, they usually so sharp, but sharpness is not all. 28mm reminds me F 35-70mm somehow, similar "style". Not sure I need two "same style" lenses.
05-16-2015, 08:09 PM   #7
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QuoteOriginally posted by micromacro Quote
I like F series Pentax, they usually so sharp, but sharpness is not all. 28mm reminds me F 35-70mm somehow, similar "style". Not sure I need two "same style" lenses.
I am not sure what you mean by 'style'. Can you explain a bit more what you mean?
05-16-2015, 08:15 PM   #8
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QuoteOriginally posted by alamo5000 Quote
I am not sure what you mean by 'style'. Can you explain a bit more what you mean?
It's hard to explain really. When I look at samples of F28mm, they remind me 35-70mm samples pretty much. I'm not an expert in definitions, I just see some similarities. Like DA 70mm f2.4 ltd images look a bit similar to M 75-150mm f4. It's all subjective of course.

05-17-2015, 09:46 AM   #9
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In addition F and FA28 are FF lenses. The DA21 is not.

Seb.
05-17-2015, 11:19 AM   #10
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QuoteOriginally posted by bassek Quote
In addition F and FA28 are FF lenses. The DA21 is not.

Seb.
Thanks, I keep that in mind because most likely I will go for Pentax FF. (for the sake of all Pentax LBA)
05-17-2015, 03:29 PM   #11
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QuoteOriginally posted by micromacro Quote
Thanks, I keep that in mind because most likely I will go for Pentax FF. (for the sake of all Pentax LBA)
If you want FF with some macro ability, the current Sigma 28mm EX DG f/1.8 lens is a good choice, if you don't mind the size. 77mm filter thread on that model. The older pre-EX, pre-DG Aspherical AF model is more compact with a 58mm front filter thread. I have the older one, and in some ways it compares well to Pentax FA 31mm f/1.8. Bokeh on the FA 31 is better, and the FA Limited all metal build is a step up of course, so you might want to consider the FA 31 if it's in your budget.
05-18-2015, 08:33 PM   #12
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QuoteOriginally posted by Michaelina2 Quote
Have you considered the HD DA 20-40 Limited? Besides 28mm, you get whatever other FL you wish between 20mm and 40mm.

Cheers... M
Yes, I have, but instead decided to go for 15mm f4 limited and sigma 30mm f1.4. Those two will cover all I really need for landscape and streets, and I like image samples from both lens.
05-19-2015, 05:52 AM   #13
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I have a Sigma 28mm f1.8 macro - very nice, great up close and in darker environments. It's not small, though. How it compares with their 30mm offerings you'd have to research.

The DA21mm is one of my favorites outdoors in wide areas. It has plenty of contrast and is really quite fun.

A budget consideration is the DA 16-45 which served me very well but doesn't get much use now.
05-19-2015, 06:35 AM   #14
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Out of curiosity, which manual 28mm do you have?

My old 28mm macro has such a long focus throw that its almost too easy to nail focus with the thing. (To get an idea, if you look at the distance scale, you can actually see the beginning and the end on the same side of the lens - it has about a 270 degree (possibly longer) throw.
05-19-2015, 07:22 AM   #15
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QuoteOriginally posted by Sagitta Quote
Out of curiosity, which manual 28mm do you have?

My old 28mm macro has such a long focus throw that its almost too easy to nail focus with the thing. (To get an idea, if you look at the distance scale, you can actually see the beginning and the end on the same side of the lens - it has about a 270 degree (possibly longer) throw.
I have tokina and dejur 28mm, and wider vivitar 20mm, and with all 3 my eyes get tired very quickly with manual focusing on something far than a couple of feet. Yes, I can, but miss the focus more often. Too much work, need easy for eyes AF.
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