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12-19-2007, 11:47 PM   #1
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good 28-70/80 f2.8 sugestions

ok needs to be sharp must have internal zoom and focus so that front element dose not rotate or extend as filter/hood system which is heavy will be mounted often, need 28-80 realm and needs to be sharp at 2.8.
used to have a tokina 28-70 2.8 pro sv but something went skew and its gone real soft and blury at 2.8-i've had it to camera clinic twice and its still no good-was perfect untill suddenly it went to mush. mind you its still ok at 3.5 and wicked sharp at f4 onwards unfortunately this is no good for me as most of my shooting is at 2.8-love the short d.o.f

any sugestions other than the sigma 20something to 75 2.8 (this extends the front element so i get lens droop when the filter/hood system is on)

thanks guys

oh and if anyones got a tokina 28-70 2.8 thats pin and wants to sell, i'll have a look

thanks again

12-20-2007, 12:17 AM   #2
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Tamron 28-75mm f/2.8 IF
12-20-2007, 12:21 AM   #3
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thanks budd does the front element extend when zooming?

yes it does damn it almost doubles its length i gota hang a pro 4 reflex lens hood/filter system of the front of this thing(its heavyish)

yeh but worth a closer look if all else fails, thanks bood

Last edited by forestG; 12-20-2007 at 12:30 AM.
12-20-2007, 02:15 AM   #4
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Tamron 28-75

The Tamron 28-75 f2.8 is one of the best lenses I have ever used. Unfortunately I got rid of it when I sold all of my Canon gear. Get it without any reservations.

Here is a sample.

Ben

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12-20-2007, 07:32 AM   #5
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Almost all of these zooms extend when zooming.
I think the Sigma 24-70mm f2.8 EX DF doesn't, because it has a dual focus system, but I'm not sure. This one is reported to be quite sharp.

I'm using a Sigma 28-70mm f2.8 EX Aspherical (one of the first versions) myself, and have been very pleased with it up till now. The front element does extend, but doesn't rotate. Sharpness at f2.8 isn't spectacular, but it's sufficient for on digital (some USM in PP is no trouble...)

Pardon me for asking this, but your requirements seem a little strange. All of these lenses come with their own dedicated hood, and popping a UV or clear filter on there to protect the lens element isn't that costly...
I'm also wondering what kind of filter system is that heavy that it could damage a lens? :s


You could always look for a FA* 28-70mm f2.8, if your wallet agrees with you

Tom
12-20-2007, 08:38 AM   #6
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I have been looking at sigma 24-60 f2.8 and 24-70 f2.8 for a similar need.

With my other lenses, I am wanting the 24mm toclose the gap between my sigma 10-20. as much as possible.

I am wrestling with the desire to have the smaller 77mm 24-60 for commonality with 4 other lenses for filters, and the reported better image quality of the 24-70 and forego the issue of common filters.
12-20-2007, 08:51 AM   #7
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Deja Vu? https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/16001-choices-choices.html

Agree with the others, Tamron 28-75mm all the way!
12-21-2007, 03:00 AM   #8
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I have to give the Tamron yet another vote! It has to be the sharpest lens in that range!! I had it when I shot Canon as well and loved it! Will eventually snag one for my Pentax as well.

12-21-2007, 10:29 AM   #9
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I've heard some bad things about the Sigma 24 or 28mm - 70mm f2.8 being soft, however the 28-70 I demo'd a short time ago was sharper than 80% of my lens collection

I may have gotten lucky, and just tried an exceptional copy.
12-21-2007, 11:46 AM   #10
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Hmm, how come nobody recommends the the Pentax FA 28-70 f/2.8 AL?
The images that I've seen that were shot with it all look fantastic.
12-21-2007, 02:46 PM   #11
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Cuz they are hard to find and I wouldnt recommend a $1500 lens to anyone. But if you got it like that, then more power to ya!
12-21-2007, 02:48 PM   #12
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QuoteOriginally posted by benjikan Quote
The Tamron 28-75 f2.8 is one of the best lenses I have ever used. Unfortunately I got rid of it when I sold all of my Canon gear. Get it without any reservations.

Here is a sample.

Ben

I got mine off of Ben's recommendation.
12-21-2007, 03:29 PM   #13
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Tamron 28-75

Haven't tried the rest because I very pleased with this one....https://www.pentaxforums.com/forums/images/smilies/smile.gif
12-21-2007, 04:51 PM   #14
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Just a quick question? Why are you asking again?

QuoteOriginally posted by forestG Quote
ok needs to be sharp must have internal zoom and focus so that front element dose not rotate or extend as filter/hood system which is heavy will be mounted often, need 28-80 realm and needs to be sharp at 2.8.
used to have a tokina 28-70 2.8 pro sv but something went skew and its gone real soft and blury at 2.8-i've had it to camera clinic twice and its still no good-was perfect untill suddenly it went to mush. mind you its still ok at 3.5 and wicked sharp at f4 onwards unfortunately this is no good for me as most of my shooting is at 2.8-love the short d.o.f

any sugestions other than the sigma 20something to 75 2.8 (this extends the front element so i get lens droop when the filter/hood system is on)

thanks guys

oh and if anyones got a tokina 28-70 2.8 thats pin and wants to sell, i'll have a look

thanks again
Didn't you ask this very question a short while ago? I don't think you are going to get different answers. BTW I briefly owned the Tokina and thought it was poop. Way soft up to about 6.7 or so, and very bad bokeh. Returned it to KEH immediately (gotta love their no questions asked return policy) Little bit later got the Tammy and like it immensely.

NaCl(did you think we would change our minds?)H2O
12-21-2007, 04:53 PM   #15
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My tamron 28-75mm is waiting under the tree
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