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03-03-2012, 04:03 AM   #1
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Sigma 28mm 1.8 vs F 28mm 2.8 vs DA 35 limited wich is suited for me

hi guys

im interested in the following lens .can you guys tell wich will be more suited to me

lenses are
sigma 28mm
F 28mm
DA 35mm limited

i want this lens as a walk around as well as indoor and night time shooting
my camera is k5
would like to know is there a big difference in 28mm and 35mm interns of FOV
is f2.8 not suitable for night time and indoor shots ( if so then ill have to go for the sigma i guess)
how much of a real difference is there when it comes sharpness ( heard all three are abt equal at around f2.8)

Thanks

03-03-2012, 06:30 AM   #2
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I don't have experience of those two 28s,
but I have found the DA 35 Macro to be an excellent walk-around lens.
It is sharp enough for indoor and night shots at f/2.8 on my K-x,
so should be even better on your K5.
I prefer the slightly longer "normal" view of the 35mm focal length.
If you don't know your own preference yet,
you can experiment with a zoom at 28mm and 35mm.
03-03-2012, 06:50 AM   #3
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QuoteOriginally posted by lytrytyr Quote
If you don't know your own preference yet,
you can experiment with a zoom at 28mm and 35mm.
Exactly right. If an 18-55 is available, tape it at various focal lengths for a few days each, and see which is more suitable for your walkabouts. I personally don't prefer 35mm for walkabout (although I'll try a new-to-me 35/2.5 today). Except for the FA50/1.4, all my primes are manual focus, and my preferred strolling lens (day or night) is a Vivitar-Komine 28/2 CFWA. Second favorite is a Vivitar-Kiron 24/2. Next is the FA50/1.4. My Nikkor-0 35/2 (modded for PK) is further down the list.

Keep in mind that shorter focal lengths have a couple advantages over longer lenses.

1) Slower shutter is possible. If we use the 1/FL rule with SR on, than a 24mm lens can shoot 1/3 slower than a 35mm lens for the same sharpness.

2) DOF is thicker. The Online Depth of Field Calculator shows that a 24/2 has DOF over 50% thicker than a 35/2. This can be crucial in street shooting.

DOF differences between 28/2 and 28/1.8, and between 24/2 and 24/1.4, are trivial. Light-gathering differences are a bit more significant. And personal style may dictate longer lenses, thinner DOF, more surgical isolation of subjects from their contexts. It depends on the width and contents of those streets, eh? My night-stalking kit contains the Vivitar 24/2, FA50/1.4, Nikkor 85/2, and a Takumar 135/2.5.

Last edited by RioRico; 03-03-2012 at 07:03 AM.
03-03-2012, 07:13 AM   #4
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F 28mm

I have the F28. I didn't pay a lot for it and the build isn't up to that of my other lenses, but when it comes to image quality it is certainly in the hunt. I use it as a walkaround when I'm traveling because it is my lightest lens. I like the field of view, it is fast enough for most interiors, and it is useable as a macro.

http://i1093.photobucket.com/albums/i436/oeriies/landscapes%20flowers%20planes/nationallibrarytochristianshavncopenhagen.jpg
http://i1093.photobucket.com/albums/i436/oeriies/landscapes%20flowers%20planes/annemariecarlnielsonmermaidIIoutsidenationallibrarycopenhagen.jpg
http://i1093.photobucket.com/albums/i436/oeriies/landscapes%20flowers%20planes/fuschiaincircle.jpg

03-03-2012, 08:11 AM   #5
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The sigma is huge and not likely very sharp wide open

The F28 is really fantastic, small/light, has a character and super sharp stopped down and even wide open. The only downside being bokeh can be a bit busy sometimes. The FL is perfect. As for indoors low light 2.8 isnt the fastest but you can make do if you push ISO. I have taken some of the best photos of family with this:




The DA35 Ltd is pricer, likely the best IQ/build, super close focus, AF might hunt a bit bc its a macro

You could also look at the DA35 2.4 or the FA35 2.0 both are faster and great (almost identical) the DA35 is a steal

________________

I might be willing to part with my F28, just bought the FA43 which has kind of replaced the F28 for me, even though the FL isnt nearly as good as the F28, I may save for the FA31 with the proceeds...

Last edited by Deimos; 03-03-2012 at 08:19 AM.
03-03-2012, 09:35 AM   #6
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I second the F28 it is pretty sharp wide open and gets better after stopping down. I've only had for a couple months and it's my favorite prime when I'm not taking portraits. I find the build quality to be very good, it just looks and feels cheap due to the dark grey rubber that wraps around the lens. Also the auto focus is very fast due to the short throw (might be my fastest among my F35-70,F50,F135 and F100 when limiter is on) and not as noisy as the rest of the F series lenses.
03-03-2012, 11:14 AM   #7
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The best of the 3 lenses is the DA 35mm f/2.8 Macro Limited in terms of versatility, build quality and Quick Shift.
03-03-2012, 02:15 PM   #8
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I own the Sigma 28/1.8 EX.
It's true that it is not a small lens but it is sharp at all apertures.
I don't see the point in f/2.8 primes around this focal length as they can be replaced by one of the excellent Tamron zooms.
My Sigma has very nice bokeh and I love its close focusing abilities. It is not quite a macro but there isn't much space left between subject and front element when you go as close as possible. When I'm back on a proper computer I may be able to find an image sample thread for the Sigma 28/1.8 EX.

Edit: The Sigma cannot be that bad when it receives an average rating of 9 from users.


Last edited by Class A; 03-03-2012 at 02:23 PM.
03-03-2012, 06:18 PM   #9
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The Sigma is the priciest out of the lot where im at and have seen lot reviews saying its not sharp at 1.8 but equally sharp around 2.8 with other F 28 ,DA 35 lenses is this true.
DA 35 f2.0 seem to have very bad Bokeh (havent used it citing this after reading rewiews )
03-03-2012, 09:35 PM   #10
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QuoteOriginally posted by Class A Quote
I don't see the point in f/2.8 primes around this focal length as they can be replaced by one of the excellent Tamron zooms.
I use both the Tamron 17-50/2.8 (A16P) and the DA 35 Macro Ltd.

While the Tamron has the flexibility of a zoom,
which is useful for travel and events,
the DA 35 Macro Ltd is a true 1:1 macro,
is much more discreet on the street,
and has more satisfying color and rendering
than you could ever fake from the Tamron in PP.
03-03-2012, 11:52 PM   #11
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what do you guys think about the sigma its less expensive have a great bokeh and have the FOV that i really like (28mm on my k5) and also have the macro ability (may not be true macro but i have a 90mm tamron macro as well)
only hesitation is about its sharpness. over here in the lens reviews it has a sharpness score of 8.so how much of a difference does sharpness score of 8 have when compared to a sharpness score of 9.
and at f2.8 which one is the most sharpest and by what margin (eg. negligible or does have a impact )

DA limited 35 mm
Sigma 28 mm
F 28 mm
DA 35 mm AL

Thanks

03-04-2012, 07:52 AM   #12
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You cant really compare sharpness using the reviews database, they are all subjective, more of an indicator than a rule.

Im sure the Sigma will be sharp enough wide open for what it is if you nail the focus, after all nothing else here does 1.8..

The DA Ltd, being a Macro will likely be the sharpest, that said the FA35 2.0 was also known a having some of the highest MTF figures of any Pentax lens stopped down. Check out photozone.de for tests

But its not all about sharpness, I think anything on the list will be sharp enough stopped down a bit.

They are all different lenses:

The sigma is fast and will get you shots the others cant, but it is very large and heavy so u may not want to bring the camera out, the AF might also be soso

The DA Ltd will give excellent IQ and macro/close focus ability, but having Macro focus, AF can hunt, only 2.8 vs the Sigma but smaller, Bokeh can be busy

The F28 will give great IQ, is small/light and less expensive, bokeh can sometimes be busy, some ppl dislike the look of the lens, I like it, very sharp wide open and stopped down, fast AF

The DA L 35 2.4 is the cheapest by far, is based on the excellent FA35 2.0, is actually a little bit faster in usage than 2.4 I believe, gives great IQ for the $, small/light, fast AF

The sigma and F28 will give the most natural FOV similar to what you see with the camera down, the 35mms will be close but a bit more zoomed, still very natural. I like 28 the best for walk around

At the end of the day just pick one and you can always resell it and try another later I would say go for the DA L, great IQ but it is small/light, the cheapest and second fastest, otherwise you can buy my F28

Check out sample photos from each lens here:
https://www.pentaxforums.com/forums/lens-sample-photo-archive/

Also a bunch of F28 shots on my flickr

Last edited by Deimos; 03-04-2012 at 08:03 AM.
03-04-2012, 03:52 PM   #13
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The FA35/2 should be on the shortlist for anyone looking for primes in this FL range. Small, sharp, reasonably priced, and usefully faster than the various f/2.8 zooms. Being FF compatible & having an aperture ring is a bonus. The other lens missing from this list is the Sigm 30/1.4. I think the DA35/2.8 & DA40/2.8 are solutions looking for problems, too slow for primes. My favourite in this range though is the FA31, but that's a pricey option.
03-05-2012, 05:21 AM   #14
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thanks for the input guys i think i will go with the sigma because of the versatility it brings. some times they say jack of all trades master at nothing i hope its not with sigma in this case. And i did went through the photo achieve and F28 looks really sharp but couldn't find any pics taken form the sigma. hopefully sigma is close to that sharpness stopped down to about f2.8 .
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