What is the sharpest zoom lens that you have used?


jbanjeet

Link Posted 17/07/2011 - 11:31
you could post flickr links to pictures taken
and also tell us how much the lens costs
Last Edited by jbanjeet on 17/07/2011 - 11:34

Luftwalk

Link Posted 17/07/2011 - 11:32
I think it's probably the Tamron 70-200mm f2.8
Very sharp lens.

Anvh

Link Posted 17/07/2011 - 11:46
DA*50-135
I think most of the sharpest zooms will be in the short tele range.
Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ

vrapan

Link Posted 17/07/2011 - 11:49
This is a question very much open to interpretation... sharpest wide open? sharpest on the tele end sharpest on the wide end?

I think the best zoom lens I have used is the 50-150 Sigma followed by the 17-50 Tamron. Both benefit from stopping down from 2.8 to about 3.5/4 both are not at their best at the very extremes.

Never used a 70-200, find them extremely big and bulky though I was very tempted by the 70-200 Tamron mentioned above. Heard the 50-135 Tokina is absolutely great as is its Pentax equivalent

Couple with the 50-150, I will be happy if the 50-135 is just as good

http://flic.kr/p/9X6oej
http://flic.kr/p/9WUE6K
Last Edited by vrapan on 17/07/2011 - 11:50

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thoughton

Link Posted 17/07/2011 - 12:02
Tamron 17-50 for me. I posted about it ages ago, along with a sample 1:1 crop: here.
In my own tests (which could easily be wrong) the sharpness peaked at f5.6 where it is razor sharp. At f2.8 it's decent, but not especially sharp.

I also have a Sigma 70-200 which is pretty sharp wide open. I posted some 1:1 comparisons, both with and without teleconverters, here.
Tim
AF - Pentax K5, Sigma 10-20/4-5.6, Tamron 17-50/2.8, Sigma 30/1.4, Sigma 70-200/2.8, Tamron 70-300/4-5.6
MF - Vivitar CF 28/2.8, Tamron AD2 90/2.5, MTO 1000/11
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i-Berg

Link Posted 17/07/2011 - 12:11
The 'sharpest' zoom I've used is also the DA*50-135, but subject to the caveats already mentioned here by Vrapan.
http://www.pbase.com/iberg

Anvh

Link Posted 17/07/2011 - 12:16
i-Berg wrote:
The 'sharpest' zoom I've used is also the DA*50-135, but subject to the caveats already mentioned here by Vrapan.

It's probably true for most lenses that they benefit in resolution by stopping down but does someone know a lens where that isn't the case?
Stefan


K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ

greynolds999

Link Posted 17/07/2011 - 12:16
I would say, but this is a Pentax only forum!
My Photobucket

i-Berg

Link Posted 17/07/2011 - 12:28
Anvh wrote:
i-Berg wrote:
The 'sharpest' zoom I've used is also the DA*50-135, but subject to the caveats already mentioned here by Vrapan.

It's probably true for most lenses that they benefit in resolution by stopping down but does someone know a lens where that isn't the case?

The relevant ones included were "sharpest on the tele end sharpest on the wide end?".
http://www.pbase.com/iberg
Last Edited by i-Berg on 17/07/2011 - 12:29

Pentaxophile

Link Posted 17/07/2011 - 12:29
Another vote for the Tamron 17-50. I wouldn't hesitate to recommend this lens to sharpness junkies. My 'Cwmorthin' gallery shot was with the Tamron and at 1:1 everything from the grass blades in the foreground to the stones of the ruined building was clean and sharp, right to the edges. It was shot at f5.6.
[link=https://500px.com/will_brealey/[/link]

simonkit

Link Posted 17/07/2011 - 12:49
DA12-24mm, for such a wide angle it really does produce very sharp images - reviews suggest it outperforms the Pentax prime lenses in the same range, I've never compared but I can well believe it

Simon
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Corker2211

Link Posted 17/07/2011 - 12:59
My Phoenix 28-210mm Lens does quite well. The Tamron 70-300mm Lens does a great job, also. Since I can't afford those big fancy, expensive Lens that I really don't need, I use what I have and they seem to work just fine. I would just love to have one of those big Wildlife Lens's, but they are for Professional people. I just don't have $1000 - $3000 to spend on Lens's like that.

Regards,
Les
"Those who do nothing . . . make no mistakes in Life"

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I'm just full of questions . . . It's the only way I learn anything! I have so, so, much to learn using my Pentax K100D DSLR

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Algernon

Link Posted 17/07/2011 - 13:23
If your shooting at around f/8 the Pentax 18-55mm Kit lens is very
sharp, almost as good as the 43mm Limited and better than 24, 28 and
35mm M and A primes.

For longer lenses the Pentax 55-300mm is quite sharp at f/8.

You can compare non-Pentax lenses here: link
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi

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lemmy

Link Posted 17/07/2011 - 14:34
simonkit wrote:
DA12-24mm, for such a wide angle it really does produce very sharp images - reviews suggest it outperforms the Pentax prime lenses in the same range, I've never compared but I can well believe it
Simon

I had both the 12-24mm and the 15mm and sold the 15mm because, lovely little lens that it was to use, the zoom was so much sharper at f4 throughout the range. The 15mm needed to be stopped down to f8 to get properly sharp, as all the magazine tests confirm.

I found that if you didn't need wide apertures,the 18-55 kit lens stopped down to f8 was superb. I only changed mine because I wanted a wider angle but looking back, for what I got for it, I should have kept it.

But back to the OP, the Pentax 60-250mm is about the best zoom I've ever used when set to 135mm and over. At 60mm it's less so, though still more than acceptable.
lemmy
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Algernon

Link Posted 17/07/2011 - 15:30
This was a test shot between the Pentax 18-55mm Mk2 lens and the
Pentax 43mm Limited. Both f/8 at 1/200th (tripod) 200ISO K-5

1:1 (100%) Compare captured by a screen grab at 1280 wide.
This is the centre of the frame, but the edge was very
similar. The 43mm was slightly better in the corner.

This one has been reduced to 800w and slightly sharpened.




The 1280w original unsharpened is here:

http://uppix.net/c/0/8/4a4a760fa76be196f270cd16b2dd8.jpg

I've deliberately not said which is which

-
Half Man... Half Pentax ... Half Cucumber

Pentax K-1 + K-5 and some other stuff

Algi
Last Edited by Algernon on 17/07/2011 - 15:36
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