Which photo is which lens at 135mm?

striker_ · 10-29-2013, 08:46 AM

Nothing scientific Had nothing to do and compared my lenses at 135mm f8 center crop 100%.

The lenses are:
K 135/2.5
DA 50-200WR
DA 55-300

Which one is which?

135mm-testf8 | Flickr - Photo Sharing!

D1N0 · 10-29-2013, 09:19 AM

My guess would be 1. 55-300 2 k-135 3. 50-200

Driline · 10-29-2013, 09:26 AM

Originally posted by D1N0

My guess would be 1. 55-300 2 k-135 3. 50-200

What he said.....

kh1234567890 · 10-29-2013, 10:45 AM

Some time back I did something similar, but at f5.6 - 135mm f5.6 Test - a set on Flickr

thornburg · 10-29-2013, 10:57 AM

IMO, testing at f/8 is a little silly.

If all your shots were taken at f/8, then there's no need for f/4 or f/2.8 lenses.

bdery · 10-29-2013, 11:29 AM

Originally posted by D1N0

My guess would be 1. 55-300 2 k-135 3. 50-200

Ditto.

striker_ · 10-29-2013, 12:34 PM

Well. If I did see a comparison like this I would also say 55-300 - 135 - 50-200 but the result is:

Upper left: DA 50-200 WR
Upper Right DA 55-300
Down: K135/2.5

Im confused too.

I see a lot of sample variations. The DA 50-200WR I have now is a very good one. Sharpness is equal to all M and K 135/3.5 Ive tested and it beat 2 samples of 55-300 Ive owned. The third 55-300 copy (the one tested) is better than my very good copy of DA 50-200WR.

The many white dots on the black surface on upper right pic. Is that the definition of better micro contrast?

**Just1MoreDave** · 10-29-2013, 03:57 PM

The most likely problem when the test shows something odd is focus. For me it actually saves time to keep the same setup and take three sets of shots, refocusing for each set. Then later I can see which set represents the best focused group. Sometimes I have set up a target so that the plane of focus is definite and recognizable in the test shot.

You might be happier if you did corner crops and/or wide open. The Takumar Bayonet 135/2.5 is close to the K135/2.5 in the center at f8, for sharpness.

My DA 50-200 WR is pretty good too, but wouldn't focus to infinity until I adjusted it.

123jippo · 10-29-2013, 03:58 PM

Contrast is best in last pic, thats why last one is easy to say. First 2 is more difficult but i would have say other way around cos pic1 looks little better to me, pic2 more burned white. Ur test prooves that 55-300 is not good at 135mm, my copy has worst IQ at 135mm.

bdery · 10-30-2013, 05:07 AM

Originally posted by striker_

The many white dots on the black surface on upper right pic. Is that the definition of better micro contrast?

It can be, but in truth it's not the best subject to evaluate this (or the general performance of a lens). It's hard to tell what the texture is, so it's hard to evaluate if it looks good.

10-29-2013, 08:46 AM	#1
striker_ Senior Member Join Date: May 2011 Location: Sweden Posts: 158	Which photo is which lens at 135mm? Nothing scientific Had nothing to do and compared my lenses at 135mm f8 center crop 100%. The lenses are: K 135/2.5 DA 50-200WR DA 55-300 Which one is which? 135mm-testf8 \| Flickr - Photo Sharing!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Lens comparison- which is which	normhead	Pentax SLR Lens Discussion	52	06-18-2014 06:34 PM
Which is which macro? old vs new	rp_dxn	Pentax SLR Lens Discussion	6	09-27-2013 05:48 AM
Which is which? DA16-50 vs f/2.8 Primes	carrrlangas	Pentax SLR Lens Discussion	7	06-22-2013 10:52 AM
Which lens is sharper at 50mm?	lurchlarson	Pentax SLR Lens Discussion	20	12-22-2009 02:11 PM
landscapes... which lens is sharpest at F16 to F32 etc?	slip	Pentax SLR Lens Discussion	7	01-06-2007 07:41 PM

10-29-2013, 09:19 AM	#2
D1N0 Pentaxian Join Date: May 2012 Location: --- Photos: Gallery Posts: 6,802	My guess would be 1. 55-300 2 k-135 3. 50-200

10-29-2013, 09:26 AM	#3
Driline Pentaxian Join Date: Dec 2012 Location: IOWA Where the Tall Corn Grows Photos: Gallery Posts: 3,697	Originally posted by D1N0 My guess would be 1. 55-300 2 k-135 3. 50-200 What he said.....

10-29-2013, 10:45 AM	#4
kh1234567890 Veteran Member Join Date: Sep 2010 Location: Manchester, UK Photos: Gallery Posts: 2,653	Some time back I did something similar, but at f5.6 - 135mm f5.6 Test - a set on Flickr

10-29-2013, 10:57 AM	#5
thornburg Senior Member Join Date: Aug 2012 Location: Doylestown, PA Posts: 200	IMO, testing at f/8 is a little silly. If all your shots were taken at f/8, then there's no need for f/4 or f/2.8 lenses.

10-29-2013, 11:29 AM	#6
bdery Pentaxian Join Date: Mar 2008 Location: Quebec city, Canada Photos: Gallery Posts: 9,357	Originally posted by D1N0 My guess would be 1. 55-300 2 k-135 3. 50-200 Ditto.

10-29-2013, 12:34 PM	#7
striker_ Senior Member Join Date: May 2011 Location: Sweden Posts: 158 Original Poster	Well. If I did see a comparison like this I would also say 55-300 - 135 - 50-200 but the result is: Upper left: DA 50-200 WR Upper Right DA 55-300 Down: K135/2.5 Im confused too. I see a lot of sample variations. The DA 50-200WR I have now is a very good one. Sharpness is equal to all M and K 135/3.5 Ive tested and it beat 2 samples of 55-300 Ive owned. The third 55-300 copy (the one tested) is better than my very good copy of DA 50-200WR. The many white dots on the black surface on upper right pic. Is that the definition of better micro contrast?

10-29-2013, 03:57 PM	#8
Just1MoreDave Site Supporter Join Date: Feb 2007 Location: Aurora, CO Photos: Gallery \| Albums Posts: 6,340	The most likely problem when the test shows something odd is focus. For me it actually saves time to keep the same setup and take three sets of shots, refocusing for each set. Then later I can see which set represents the best focused group. Sometimes I have set up a target so that the plane of focus is definite and recognizable in the test shot. You might be happier if you did corner crops and/or wide open. The Takumar Bayonet 135/2.5 is close to the K135/2.5 in the center at f8, for sharpness. My DA 50-200 WR is pretty good too, but wouldn't focus to infinity until I adjusted it.

10-29-2013, 03:58 PM	#9
123jippo Senior Member Join Date: Mar 2012 Photos: Gallery Posts: 165	Contrast is best in last pic, thats why last one is easy to say. First 2 is more difficult but i would have say other way around cos pic1 looks little better to me, pic2 more burned white. Ur test prooves that 55-300 is not good at 135mm, my copy has worst IQ at 135mm.

10-30-2013, 05:07 AM	#10
bdery Pentaxian Join Date: Mar 2008 Location: Quebec city, Canada Photos: Gallery Posts: 9,357	Originally posted by striker_ The many white dots on the black surface on upper right pic. Is that the definition of better micro contrast? It can be, but in truth it's not the best subject to evaluate this (or the general performance of a lens). It's hard to tell what the texture is, so it's hard to evaluate if it looks good.