looking for a fast 28mm... ultron is a good choice?

[luuca]

Hi, I'm going to buy a sony nex5 to use with my m-mount lenses (via adapter).

unfortunately the crop factor turns my tiny summicron 35 in a 50mm...

so I decided to look for a 28mm small and fast.

is the ultron 28 f2 so big in comparison with zeiss 28 f2.8 and elmarit 28 f2.8 v.3??

I'd like to have a 1-stop-advantage but I need a relatively small lens...

 

[Doug]

Hi -- The 28 Summicron ASPH is smaller than the last non-ASPH 28 Elmarit; it's the newer 28 Elmarit ASPH that is the small one of these three. But the Ultrons are faster than the Elmarits of course. I've not used either Ultron, but I understand the f/2 is smaller than the f/1.9, while the f/1.9 is preferred for better performance on digital. You might search RFF for previous threads discussing these lenses.

 

[flip]

The 1.9 is only small after you purchase the 35/1.2.

 

[luuca]

Hi -- The 28 Summicron ASPH is smaller than the last non-ASPH 28 Elmarit; it's the newer 28 Elmarit ASPH that is the small one of these three. But the Ultrons are faster than the Elmarits of course. I've not used either Ultron, but I understand the f/2 is smaller than the f/1.9, while the f/1.9 is preferred for better performance on digital. You might search RFF for previous threads discussing these lenses.

I know new elmarit is smaller, but it's too expensive for my needs (I don't like 28mm on 35mm, I will probably use it only with nex5)

for what I read biogon and old elmarit are 4cm long, is ultron much longer?

 

[Nikkor AIS]

Check out the Images section in the Cosina Voigtlander section. There is 28 1.9 thread with some images with the 28 1.9.


Gregory

 

[luuca]

thank you Gregory and JSU