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05-25-2010, 05:02 AM   #1
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Voigtlander or Pentax A* ??

Good morning to all,
as I said, indeed wrote, in another post
https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/101725-my-ex-p...5960418-a.html
I have stolen my a * 135.
Now I would buy it again, but I don't know if choose still 135 * or betting on Voigtlander 125.
I asked this question after seeing this site
PLG SMC Pentax-A* 135mm 1:1.8 vs Voigtländer Macro APO-Lanthar 125mm F2.5 SL
Guardardo the cropp, at f/2.8 the voigtlander seems very advantage, coloured, sharpening and friming non-existent.
Looking at this site, it seems that the famous Pentax, both a dustbin ..... It seems strange to me. ..

Last thing, I had the 135 *, sin which are not, never managed to use it,
so I do not have even one click.

Last thing I would ask you not to treat the side macro.

Thank you

05-25-2010, 06:01 AM   #2
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The VL125 won me over not only because the absence of purple fringing, but also for being insanely sharp wide open. This portrait was shot wide open:

http://i385.photobucket.com/albums/oo293/spotmatic/apojeroen.jpg

Notice the microcontrast! So I'll never get rid of mine. It does landscapes also extremely well.
05-25-2010, 07:01 AM   #3
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QuoteOriginally posted by Asahiflex Quote
The VL125 won me over not only because the absence of purple fringing, but also for being insanely sharp wide open. This portrait was shot wide open:

http://i385.photobucket.com/albums/oo293/spotmatic/apojeroen.jpg

Notice the microcontrast! So I'll never get rid of mine. It does landscapes also extremely well.
Cabbage ... really well defined.
For now, 1-0 for the voigtlander

The problem is to find one
05-25-2010, 07:09 AM   #4
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QuoteOriginally posted by bollicina31 Quote
Cabbage ... really well defined.
For now, 1-0 for the voigtlander

The problem is to find one
Indeed; it took me over a year to persuade the original owner to sell it to me

Fortunately, finding one should not be much harder than to find an A* 135/1.8. But it isn't easy indeed. You can only hope for Cosina to re-issue the 125 just like they did with its smaller brother:

Voigtländer Apo-Lanthar 90mm SL II now available in Europe: Digital Photography Review

05-25-2010, 08:55 AM   #5
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Well, the Lanthar has a terrible underexpose at 1.8
The A* has a serious purple fringing problem wide open, the test mentioned in the first post suffers from exposure differences, and probably also some focus variation, which makes the comparison a bit difficult.
I suspect that serious differences are gone at 1:4.0 and smaller apertures.
I have to do my own test if I find the time.
05-25-2010, 12:39 PM   #6
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QuoteOriginally posted by Asahiflex Quote
Indeed; it took me over a year to persuade the original owner to sell it to me

Fortunately, finding one should not be much harder than to find an A* 135/1.8. But it isn't easy indeed. You can only hope for Cosina to re-issue the 125 just like they did with its smaller brother:

Voigtländer Apo-Lanthar 90mm SL II now available in Europe: Digital Photography Review
The problem is just that, or find ...

a new 125 SL II would be nice


QuoteOriginally posted by glasbak Quote
Well, the Lanthar has a terrible underexpose at 1.8
The A* has a serious purple fringing problem wide open, the test mentioned in the first post suffers from exposure differences, and probably also some focus variation, which makes the comparison a bit difficult.
I suspect that serious differences are gone at 1:4.0 and smaller apertures.
I have to do my own test if I find the time.
I was also pensado the 135 A *, has not been well exploited.
According to many, and the photos you see around is a fantastic lens.
It seems strange that I afoto so painful.
Friming is suffering from a knowledge of all now.
05-25-2010, 12:41 PM   #7
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QuoteOriginally posted by glasbak Quote
Well, the Lanthar has a terrible underexpose at 1.8
The A* has a serious purple fringing problem wide open, the test mentioned in the first post suffers from exposure differences, and probably also some focus variation, which makes the comparison a bit difficult.
I suspect that serious differences are gone at 1:4.0 and smaller apertures.
I have to do my own test if I find the time.
Can you kindly just a test, it takes just 2 clicks
@ F / 2.5, just to understand whether they have the wrong focus, or do I really worth 135 A *

I would be very grateful
05-27-2010, 10:08 AM   #8
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up please

Please, give me your suggestion, an opinion.
According to you, the difference between the Voigtlander and Pentax is so much??
By link that I posted on top
It seems that pentax has a scrap in comparison.

Help!!

Ps:
is it true that the Pentax, is difficult to use, at the level of focus??
tkx


Last edited by bollicina31; 05-27-2010 at 10:15 AM.
05-27-2010, 10:54 AM   #9
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Just try to persuade glasbak (see above) to do a test for you because he owns both lenses. He has limited time though. Or maybe I should ask him to get this lens from him on loan for a short time (I have done that before)
05-27-2010, 03:38 PM   #10
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Just some astro photo's I made some time ago at my lightpolution plagued location.
This was the moment I discovered that my k20d came back from repair with another problem than it had before (extreme noisy, and a strange band).
This was solved by a second repair.

I made these pictures to test how usefull live view is for astrophotography, I do not think I achieved the optimum focus for all pictures yet.

They show the area around M51, near the big dipper (ursa major).
First the resized aps-c image, then two 100% crops
The first crop is the (vastly overexposed) star alkaid of ursa major.
The second crop is galaxy M51.

A*85 at 1.4:


A*85 at 1.4 crop alkaid :


A*85 at 1.4 crop M51 :


Here the lightpolition brightens the background, the exposure of 20 sec was too long.
All other exposure times are the same, 30 sec.


A*135 at 1.8:


A*135 at 1.8 crop alkaid :


A*135 at 1.8 crop M51 :



Next raw pictures I had to stretch the levels seriously.

V125 at 2.5:


V125 at 2.5 crop alkaid :


V125 at 2.5 crop M51 :



A*200 at 2.8:


A*200 at 2.8 crop alkaid :


A*200 at 2.8 crop M51 :


It is clear that the Voigtlander and the A*200 have superior color corrrections, but the speed of the 135/1.8 allows the better recording of M51.

Also note that although the exif records 2.4, and the Voigtlander is sold as a 2.5, the real value is probably closer to 2.8 than 2.4.

George
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