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05-11-2012, 06:00 AM   #16
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QuoteOriginally posted by V'cuz Quote
The aperture that the 28 mm lens was the sharpest didn't matter as long as it was by f/8, f11 the smallest. I wanted something that was sharp close and also far, a lens that on average was the best at both distances .
I think it got covered pretty well. I will put in a good word for the M28 3.5 razor sharp at 5.6-8. not a low light monster and of course lacks on the bokeh end a bit since it's not fast. But value for dollar i think it's tough to beat. I had an m28 2.8 and got rid of it the 3.5 was just much better.

05-11-2012, 07:09 AM   #17
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QuoteOriginally posted by V'cuz Quote
The aperture that the 28 mm lens was the sharpest didn't matter as long as it was by f/8, f11 the smallest. I wanted something that was sharp close and also far, a lens that on average was the best at both distances .
If you can get the K28/3.5, go for it.
Pentax K 28/3.5 is the best 28mm I have for sharpness as you describe it.

Otherwise, I also recommend the K 30/2.8.

In case if you want a cheap and good zoom, go for the Pentax A 24-50/4 - slow, but sharp sharp.
05-11-2012, 09:31 AM   #18
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A problem with 28mm sharpness is that diffraction is starting to take over somewhere about f/6.4
See my test shots of yesterday.
I would be interested to see some shots from a k-5 with any 28mm at f/8, f/11, to see how bad it really is in real life .. ?
05-11-2012, 07:41 PM   #19
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QuoteOriginally posted by audiobomber Quote
All the concerns about light falloff in the Stan's excerpt wouldn't have much relevance on a 1.5 crop sensor.

Odd that they are so high on the FA 28 2.8 and it doesn't get much love around here.
I had an FA28/2.8 and sold it, stupidly. It is a bit soft at 2.8 - actually more that the detail highlights 'glow' a bit into surrounding details. But by 5.6 it was the equal of any other lens I have ever owned, and better at the edges than the M28/3.5 that I have now. That's not to say that the M28/3.5 isn't good - it is excellent, incredible value for money. There's a guy on DPR who habitually disses the FA28 but I disagree with him - for use wide open it's not for everyone (although it can look nicely dreamy), but as a general purpose walkaround it's good. And small/light.

05-11-2012, 08:24 PM   #20
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QuoteOriginally posted by northcoastgreg Quote
I suspect that Yoshihiko never tested/used the F (or A) version. He assumed they were inferior based on his test of the second version of the M 28/2.8. But according to his own tests, there's not much difference between any of the 28s he tested. The 28/2's seem to be the sharpest in the center, the K 35/3.5 sharpest toward the edges. But the biggest difference between the 28s is contrast and color rendition. The M 28/2.8s have the least contrast, and the least distinctive color rendition. That's the main reason they tend not to be rated as high as the other 28s. It's not because they are "softer."
I surely haven't owned very many of the referenced lenses and the text is 15 years old now - I pasted it for use as a number of opinions in a short space.

I do have the K28/3.5 and K35/3.5, both sharp and contrasty enough for me, especially at their current prices under $150 each. I'd surely like to have a K28/2 for a while, though at the price I probably couldn't afford to keep it.
05-11-2012, 09:27 PM   #21
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This is it



Crop:





Crop:





Crop:





Crop:



The Komine-built, Vivitar MC 28mm f/2.8 Close-Focus!





.
07-27-2012, 01:40 AM   #22
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Hi,

I'm pretty much of a beginner with these manual lenses.

I'm looking for standard lens for K-r. I have Tamron 17-50mm F2.8, Sigma fisheye and DA 50-200mm.

I believe that 28 mm would be usefull for me. Nice lens for walking and capturing landscape when you need lighter than heavy zoom and don't need AF/AE.

Is Pentax 28mm F3.5 really The Best of these 28mm's? Looks like it costs more than 28mm F2.8 and even more than F2! How can one know what model is the gem of all these dozens of models? Should it be takumar, Pentax-M SMC or what?

I really would like to have K-mount, not M42 with adapter.
07-27-2012, 02:21 AM   #23
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You mention you want to use it for landscape shots, so the slower 28mm is probably the best choice.

I have the (K series) Pentax SMC 28mm f/3.5 and that is a fantastic lens. The M series lens is also a very good alternative.

The 28mm f/2 lenses (Pentax or the Vivitar Close Focus komine built as seen in jsherman's post) are really great too but more geared towards close up shots and bokeh shots. They are also much more expensive, so my advice would be to go for the f/3.5 lens. The colours are really good and it just never disappoints.

Good luck!

07-27-2012, 03:17 AM   #24
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QuoteOriginally posted by paulusje Quote
You mention you want to use it for landscape shots, so the slower 28mm is probably the best choice.

I have the (K series) Pentax SMC 28mm f/3.5 and that is a fantastic lens. The M series lens is also a very good alternative.

The 28mm f/2 lenses (Pentax or the Vivitar Close Focus komine built as seen in jsherman's post) are really great too but more geared towards close up shots and bokeh shots. They are also much more expensive, so my advice would be to go for the f/3.5 lens. The colours are really good and it just never disappoints.

Good luck!
Yes I ilke to shoot with small aperture landscape and street views etc. Of course I shoot inside house my child and other people so wide aperture is used sometimes but I prefer flash bounces from ceiling in inside photography. Also I will shoot video with manual lens.

I'm looking for damn sharp lens at f8-11 like Zeiss Distagon 28mm T* is said to be. Lens should be metal and nicely constructed that it is nice to use and own
07-27-2012, 04:44 AM   #25
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For 28mm in pentax line up, f2 is known to be a dud version: bad CA and bad quality control etc. f2.8 is no different to any other lens in its league.
07-27-2012, 04:51 AM   #26
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I should really do some testing. I have a Vivitar 28/2.5 in M42 mount, a Kiron 28/2, a Vivitar 28/2.5 an M28/2.8, a Tamron 28/2.5, and a sigma Mini wide II 28/2.8

The only thing I can say at this point is the sigma is the worst, unless you are into CA adjustments by rescaling layers(I use PT lens) once corrected it is pretty good. The CA causes an impression of lack of edge sharpness.
07-27-2012, 05:22 AM   #27
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My current vote is the SMC Takumar 28 3.5 at F8 onK20D resized for web - (no sharpening applied and looks great on 22inch screen):



( Now you know why we locally pay $2.40 a litre for fuel.)
07-27-2012, 07:45 AM   #28
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Overall the K28/2 is the best lens that Pentax made in this FL.

Phil.
07-27-2012, 08:22 AM   #29
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Does someone know has 28mm f3.5 got something special designing for small aperture usage like Zeiss Distagons has (what I've understood)?
07-28-2012, 06:55 AM   #30
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QuoteOriginally posted by alspe Quote
Does someone know has 28mm f3.5 got something special designing for small aperture usage like Zeiss Distagons has (what I've understood)?
I'm not familiar with special designs for "small aperture usage" and doubt that it applies the K 28/3.5. This lens, however, does appear to have been designed with corner to corner sharpness in mind, which suggests that the lens was tailor-made for landscape use. It is unusual in that it has eight elements, which is more than most 28mm f3.5 lens have (the M 28/3.5 has only six). This is not a slow "budget" lens. When it was released, it was the only 28mm K-mount lens in Pentax's line-up (the K 28/2 came out a year or two later).
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