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09-07-2011, 04:17 AM   #1
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Really-really cheap sub-2.8 AF lens

I'm thinking about having a cheap AF lens, for occasional pub-dim snap shots. I would love to get AF primes, but with budget under $150 my hope vanishes to thin air. So I guess I'll go with really-really old and cheap zooms. I see that Sigma UC Zoom 28-70mm f2.8-4 will fit quite well. Or any other suggestion?

09-07-2011, 05:21 AM   #2
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There's always the DA 35 f/2.4. Used it should go for just a touch above $150. They're new at $189 now I think.
09-07-2011, 05:24 AM   #3
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For a

zoom
AF
fast
cheap

you're asking a lot. If you find one used, it will be because the seller doesn't know the value of the gear. I don't know that particular Sigma, but it's clear that if 150$ is the common selling price, the lens will not be spectacular. And it's f2,8 only at the wide end.

You would be much better off getting a prime. You'll get a smaller, optically superior lens, and it will be easier to fit within your budget. For instance, you can sometimes find the FA28 f2,8 selling for a little over that price.
09-07-2011, 05:44 AM   #4
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QuoteOriginally posted by firefly Quote
There's always the DA 35 f/2.4. Used it should go for just a touch above $150. They're new at $189 now I think.
I agree, IMO the DA35/2.4 is almost certainly the OP's best option for the intended purpose and budget.

09-07-2011, 05:56 AM   #5
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QuoteOriginally posted by firefly Quote
There's always the DA 35 f/2.4. Used it should go for just a touch above $150. They're new at $189 now I think.
I've seen used for such price, but I can't seem to find one on the Marketplace now. Or is there anyone here willing to part with this lens?

QuoteOriginally posted by bdery Quote
For a

zoom
AF
fast
cheap

you're asking a lot. If you find one used, it will be because the seller doesn't know the value of the gear. I don't know that particular Sigma, but it's clear that if 150$ is the common selling price, the lens will not be spectacular. And it's f2,8 only at the wide end.

You would be much better off getting a prime. You'll get a smaller, optically superior lens, and it will be easier to fit within your budget. For instance, you can sometimes find the FA28 f2,8 selling for a little over that price.

I have been spoiled by manual lenses, mostly primes. So, I know and willing to go pretty low on expectation. What I need is a rather fast AF glass to shoot not so sober friends of mine shooting pool and drinking beer in a smoke filled room. No arty shots needed, I'll save those for my MF primes, just something fast to catch embarrassing moments

Well, we get what we paid for, right?
09-07-2011, 06:40 AM   #6
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If f/4 all along the range would be OK, you could consider the FA 28-70. Very small and light, good enough IQ and VERY cheap (can be had for 50 euros here, so I'm guessing around $80 used).
Good luck.
09-07-2011, 06:42 AM   #7
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QuoteOriginally posted by victordeamorin Quote
If f/4 all along the range would be OK, you could consider the FA 28-70. Very small and light, good enough IQ and VERY cheap (can be had for 50 euros here, so I'm guessing around $80 used).
Good luck.
Along the same lines, perhaps an F35-70/3.5-4.5 for around $50 (or less if you shop around)?
09-07-2011, 06:55 AM   #8
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QuoteOriginally posted by minahasa Quote
I see that Sigma UC Zoom 28-70mm f2.8-4 will fit quite well. Or any other suggestion?
I have a Sigma 28-105mm f/2.8-4.0 that I bought for 100$. I gave it to my father-in-law who absolutely loves it. It's a fast AF lens.

09-07-2011, 06:59 AM   #9
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QuoteOriginally posted by ManuH Quote
I have a Sigma 28-105mm f/2.8-4.0 that I bought for 100$. I gave it to my father-in-law who absolutely loves it. It's a fast AF lens.
There's also an AF Sigma 24-135/2.8-4.5 that gives you a little more width and reach. It's a bigger lens though, 77mm filter if I recall. I think they go for a little more, saw one on KEH for $179 the other day (I happen to be looking as I was trying to figure out how much mine might be worth ).
09-07-2011, 07:45 AM   #10
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QuoteOriginally posted by victordeamorin Quote
If f/4 all along the range would be OK, you could consider the FA 28-70. Very small and light, good enough IQ and VERY cheap (can be had for 50 euros here, so I'm guessing around $80 used).
Good luck.
QuoteOriginally posted by dgaies Quote
Along the same lines, perhaps an F35-70/3.5-4.5 for around $50 (or less if you shop around)?
Those are a good lenses I'm sure, but I have a feeling that F4 could not do this.
I need something F2.8 For instance, I've tried pushing up to ISO 800 using M 35/2.8 with /15-25 sec. or Adaptall 24/2.5 with /25-50 and got decent pictures. But, fiddling with MF meaning loosing the element of surprise.


QuoteOriginally posted by ManuH Quote
I have a Sigma 28-105mm f/2.8-4.0 that I bought for 100$. I gave it to my father-in-law who absolutely loves it. It's a fast AF lens.
QuoteOriginally posted by dgaies Quote
There's also an AF Sigma 24-135/2.8-4.5 that gives you a little more width and reach. It's a bigger lens though, 77mm filter if I recall. I think they go for a little more, saw one on KEH for $179 the other day (I happen to be looking as I was trying to figure out how much mine might be worth ).
Hmm.. interesting..could be lower perhaps
I know that with non-fixed aperture zooms I have to use it at the widest, meaning that I will not get the best sharpness, but I think I can still recognize a face inthe crowd
09-07-2011, 07:53 AM   #11
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QuoteOriginally posted by minahasa Quote
Those are a good lenses I'm sure, but I have a feeling that F4 could not do this.
You're right, something f/2.8 (or faster) would be ideal for what you describe.

I still think the DA35/2.4 is your best option given your budget. The IQ is excellent, it focus very quickly, and it's very compact and light. You should be able to find one for under $150 used as the new price is down to around $175 at this point (in the US at least).
09-07-2011, 07:55 AM   #12
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Was a time you could get the FA 50/1.4 for ~$150 used, but that time is long gone.

DA 35/2.4 is your best bet.
09-07-2011, 07:56 AM   #13
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As for the primes, is the DA 35mm F2.4 AL will give me real 35mm on my K20D, or is it a 1.5 multiply? I also find Sigma 24mm f2.8 Super Wide II attractive, but the AF version is not easy to find.
09-07-2011, 07:58 AM   #14
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Any lens's effective focal length on a Pentax dSLR will be 1.5x the printed focal length in film terms.

Which is to say the 35/2.4 behaves like a ~53mm lens.
09-07-2011, 08:08 AM   #15
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QuoteOriginally posted by minahasa Quote
As for the primes, is the DA 35mm F2.4 AL will give me real 35mm on my K20D, or is it a 1.5 multiply? I also find Sigma 24mm f2.8 Super Wide II attractive, but the AF version is not easy to find.
As deadwolfbones said, the equivilent FOV for all lenses on a Pentax DSLR is 1.5x the true focal length. So the 35/2.4 would be closer to the FOV of a 50-55mm lens on film while the 50/1.4 would be closer to the FOV of a 75mm lens on film. So the 35/2.4 will give you closer to a "normal" perspective on a Pentax DSLR, while the 50/1.4 would give you something closer to a "short telephoto" perspective.

The Sigma AF 24/2.8 is a nice lens, I used to have one. They're hard to find, and unless you get lucky, they generally sell for closer to $250.
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