Opticallimits

... and have a look whether you learned something over the last years ....



I've attached the MTFs of a lens. Which one and what do you see here ?

This is not (really) a joke.

Not the SMC Pentax DA 50mm f/1.8? <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/tongue.gif' class='bbc_emoticon' alt='' />

[quote name='Klaus' timestamp='1349205448' post='20468']

... and have a look whether you learned something over the last years ....



I've attached the MTFs of a lens. Which one and what do you see here ?

This is not (really) a joke.





[/quote]



Prime or zoom?



My first thoughts were, in order:

Sigma 30/1.4

Canon 28/1.8

Sigma 28/1.8

Sigma 24/1.8

Pentax FA43/1.9

Sony 16/2.8



But none really match, maybe the Canon 28/1.8 has the most similar characteristic with the wavy correction at the corners.

Interesting. A pancake?



-- Markus

[quote name='Klaus' timestamp='1349205448' post='20468']

... and have a look whether you learned something over the last years ....



I've attached the MTFs of a lens. Which one and what do you see here ?

This is not (really) a joke.





[/quote]



All wrong so far. Please look 'behind' the question.

For fun I would say Canon 50mm f/1.0, but I doubt the centre resolution would be so high!



Interesting action in the border/corner region there. Badly corrected spherical aberration?

[quote name='Klaus' timestamp='1349208306' post='20472']

All wrong so far. Please look 'behind' the question.

[/quote]



Ah, ok.



MTF not corrected for field curvature? Of a lens with strong FC?



-- Markus

[quote name='mst' timestamp='1349208577' post='20474']

Ah, ok.



MTF not corrected for field curvature? Of a lens with strong FC?



-- Markus

[/quote]



Yes

[quote name='Klaus' timestamp='1349208634' post='20475']

Yes

[/quote]



And the lens is ?

[quote name='Klaus' timestamp='1349210092' post='20476']

And the lens is ?

[/quote]



OEM?



-- Markus