candreyo wrote:
Bastian,
Have you noticed an improvement with field curvature while using the Eksma 5m on the 35mm Distagon ZM?
I'm very tempted to get the OptoSigma 5m lens at this point 😀
May I ask, how much did Laser2000 charge for the lens in Germany?
I had to pay 86.00 GBP (which included VAT and shipping) for the 1500mm Planoconvex from Laser2000 UK.
I wonder if there is another supplier elsewhere in the world that has the 5m OptoSigma lenses in stock?
Field curvature is improved, but with the Eksma 5m there is a significant midzone dip.
You might want to have a look at this post https://www.fredmiranda.com/forum/topic/1453834/20#13856720
The Eksma filter (uncoated, for coating add 67€ and 5 weeks) cost me 83,5€,
the Optosigma filter (coated, estimated delivery in February) cost me 119€ (both with shipping and taxes).
As I see things, the distributors of Optosigma filters rarely have anything in stock
and need to order everything directly from Japan.
From the shots Haruhiko posted it seems the Optosigma filter does not show that significant midzone dip,
so the Eksma filter is more of an interim solution for me until the Optosigma filter arrives.
Therefore at the moment I would not recommend buying the 5m filter from Eksma for the 35mm 1.4.
candreyo wrote:
Bastian,
Have you noticed an improvement with field curvature while using the Eksma 5m on the 35mm Distagon ZM?
I'm very tempted to get the OptoSigma 5m lens at this point 😀
May I ask, how much did Laser2000 charge for the lens in Germany?
I had to pay 86.00 GBP (which included VAT and shipping) for the 1500mm Planoconvex from Laser2000 UK.
I wonder if there is another supplier elsewhere in the world that has the 5m OptoSigma lenses in stock?
Field curvature is improved, but with the Eksma 5m there is a significant midzone dip.
You might want to have a look at this post https://www.fredmiranda.com/forum/topic/1453834/20#13856720
The Eksma filter (uncoated, for coating add 67€ and 5 weeks) cost me 83,5€,
the Optosigma filter (coated, estimated delivery in February) cost me 119€ (both with shipping and taxes).
As I see things, the distributors of Optosigma filters rarely have anything in stock
and need to order everything directly from Japan.
From the shots Haruhiko posted it seems the Optosigma filter does not show that significant midzone dip,
so the Eksma filter is more of an interim solution for me until the Optosigma filter arrives.
Therefore at the moment I would not recommend buying the 5m filter from Eksma for the 35mm 1.4.
