[Klaus]

[quote name='PuxaVida' timestamp='1313129196' post='10662']

May I ask why you're selling this rarity?



Serkan

[/quote]



Because I'm not using it and I'm not a collector.

[Brightcolours]

[quote name='Lbam' timestamp='1313108693' post='10656']

I think you've got the wrong end of the stick here...

Typically a longer focal length requires a faster shutter speed for less blurred shots. When I say blurred I'm not talking about background blur, I'm talking about reducing the effect of camera shake.

I'm this regard the Zeiss seems to win on both fronts having both a larger aperture, and a shorter focal length. Obviously the difference is small in both aspects, but it is there.



Regarding background blur, the optical design (shape of glass elements etc) of these two lenses is undoubtedly more important than their focal length/max aperture ratio, but with my calculations I did back in the day, the 125mm focal length trumps the f2.0 aperture... They are so close in the aspect though I considered it not worth mentioning.



Cross sections of the lens designs would perhaps of been a more interesting feature to add to the review.

[/quote]



The background blur AMOUNT depends on the aperture (size of the opening), and those are equal (50mm for both), so neither would trump the other



As for "camera shake", that makes little sense when you talk about it from a portrait lens perspective, wide open you usually always have light enough so camera shake does not even come into the equation.



So, still, I find that one line (or actually, it appears two times in your nice review)) puzzling after your explanation, as typical portrait use has enough light to keep camera shake well out of the equation and especially the camera you use does well at higher ISO settings too....



Which of the two lenses do you own?

[PuxaVida]

[quote name='Lbam' timestamp='1313082170' post='10635']

You can check out my review on the D700 here :



[url="http://thepictorial.com/reviews/clash-of-the-titan-macros/"]http://thepictorial....e-titan-macros/[/url]



;-)



regarding the bokeh fringing greatness in the review of the Sigma, I would guess the Voigtlander 180mm f4 SL1 would preform well too in this dept, but with smoother bokeh than the Sigma.

[/quote]



Nice to see both in one review... The VL has it's strengths, but the color reproduction of the Zeiss is something special...



By the way, are you sure the [url="http://thepictorial.com/wp-content/uploads/KLP10-2292.jpg"]PF in your test shot[/url] is because of the lens design? Do you have the VL version of this shot?



Serkan

[mst]

[quote name='PuxaVida' timestamp='1313133975' post='10673']

By the way, are you sure the [url="http://thepictorial.com/wp-content/uploads/KLP10-2292.jpg"]PF in your test shot[/url] is because of the lens design?

[/quote]



That looks familiar to me.



However, with very strong contrast or bright light sources, you can also get a super apochromatic lens to show bokeh fringing.



-- Markus

[PuxaVida]

[quote name='mst' timestamp='1313134449' post='10674']

That looks familiar to me.



However, with very strong contrast or bright light sources, you can also get a super apochromatic lens to show bokeh fringing.



-- Markus

[/quote]



I guess so...

[miro]

Hi Kevin

You have broken my illusions that this two leses are popular only by collectors, pixel peepers and technical savvy ‘photographers’.

Your work at http://www.kevinlloydphotography.com/ is wonderful. Good photographic vision and perfect techichal execution /equipment, camera/lens light settings and post processing/. Definitely I’ll spend one evening to look at your pictures.

For people interested of outdoor photography I would suggest to look at



http://www.kevinlloydphotography.com/

www.flickr.com/people/kjlloyd/



PS: BC and Marcus.Accoriding to Wikipedia the causes for appearance of PF are still not discovered completely. Some theory shows that they are caused by lenses somes are only digital cammera related.

[mst]

Kevin's site is on my to do list for later today, too.



[quote name='miro' timestamp='1313139370' post='10682']

Accoriding to Wikipedia the causes for appearance of PF are still not discovered completely. Some theory shows that they are caused by lenses somes are only digital cammera related.

[/quote]



PF (purple fringing) is at least largely sensor related, bokeh fringing (aka LoCAs) is only lens related. The linked Zeiss image shows bokeh fringing.



You can often see pictures that mix both symptoms.



-- Markus

[Brightcolours]

[quote name='mst' timestamp='1313143091' post='10685']

Kevin's site is on my to do list for later today, too.







PF (purple fringing) is at least largely sensor related, bokeh fringing (aka LoCAs) is only lens related. The linked Zeiss image shows bokeh fringing.



You can often see pictures that mix both symptoms.



-- Markus

[/quote]

And PF occurs with very high light intensity. LoCA is not light intensity related.

[popo]

[quote name='mst' timestamp='1313134449' post='10674']

However, with very strong contrast or bright light sources, you can also get a super apochromatic lens to show bokeh fringing.

[/quote]

The simple way to look at it is that unless a lens is perfectly corrected, it will show LoCA to some degree. Of course, better corrected ones will show less than others, that you might have to provoke it much harder to see anything.

[Guest]

[quote name='Brightcolours' timestamp='1313131129' post='10671']

The background blur AMOUNT depends on the aperture (size of the opening), and those are equal (50mm for both), so neither would trump the other



As for "camera shake", that makes little sense when you talk about it from a portrait lens perspective, wide open you usually always have light enough so camera shake does not even come into the equation.



So, still, I find that one line (or actually, it appears two times in your nice review)) puzzling after your explanation, as typical portrait use has enough light to keep camera shake well out of the equation and especially the camera you use does well at higher ISO settings too....



Which of the two lenses do you own?

[/quote]

I owned both lenses at the time, but sold the Voigtlander as I felt the Zeiss was mostly as capable, but would free up more funds.

I've since sold the Zeiss also and prefer to use the Nikon 85mm f1.4G for portrait stuff on the D700 due mostly to if having AF in time critical situations.

If I have more time I can always switch to the Voigtlander 90mm f3.5 <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/rolleyes.gif' class='bbc_emoticon' alt='' />



If you like to take pictures during the golden hour as I do camera shake DOES become an issue believe me... I know this because I was there, with the camera, with the lenses, pressing the release button. Strangely I feel you're now going to tell me you know otherwise, or that I was doing "something wrong" lol