Thank you tyrone.s and scottgee.1 ^^
I have zeiss jena sonnar 5cm F1.5 and zeiss jena tessar 5cm f2.8 and 2.8cm f8...
First I 'am not professional...so I would not said which is better , for my comments on 5cm lens I like sonnar at F1.5-5.6... tessar at F5.6-F11 and the size ....hahaa...But i shoot B&W amost use filter... I have not 42mm slip on filter ... so I always use sonnar....
And tessar 2.8cm f8 wide lens...good on sunny day...F11-F16 is good , easy shoot and use color film it can give you "LOMO" color...haha^^
Old lens for me is fun , appreciate and good feeling ... don't take seriously ^^
What is certain pix...?
All photos in my flickr...^^
My english very pool ... hope you can help you...