Kent
Finally at home...
I've got the adapter, but no Hexanon lens. 
Benjamin Marks
Veteran
The Konica 57/1.2 is a poor man's 60/1.2 Hexanon. It has very shallow DOF wide open and a great look. It works great on the NEX and on Oly's m-4/3 cameras. A little heavy. But that's the price you pay for fast glass.
MP/CLE
Established
Ken Ford...thank you for initiating this conversation...I had been wondering the same things but for some reason it hadn't manifested into actual questions!
I am really a novice at anything digital...I recall there being issues regarding Leica's M-8 and its smaller sensor causing the lenses to produce smaller images...i.e. a 28 mm lens resulting in an 18mm image, so the 28/35/50 tri elmar was in effect an 18/25/42, or something like that. I think it was called the crop factor.
In the case of the NEX-7, is there any crop factor involved, and if so what is it? I have a stack of great old non-af rokkor-x lenses that I'd like to play with and this is beginning to sound like a viable christmas present.
Also, another poster illustrated a very solid looking adapter for non-sony lenses and it appears to be close to a half inch thick (off the body). On epay there were several different looking models and some appeared to be quite thin...closer to a quarter inch thick, and only about $30. Would any of you have any guidance regarding what appears to be a smaller, cheaper adapter? I don't mind paying more for a quality item, but why the divergence between them?
Thank you all for a very informative thread.
I am really a novice at anything digital...I recall there being issues regarding Leica's M-8 and its smaller sensor causing the lenses to produce smaller images...i.e. a 28 mm lens resulting in an 18mm image, so the 28/35/50 tri elmar was in effect an 18/25/42, or something like that. I think it was called the crop factor.
In the case of the NEX-7, is there any crop factor involved, and if so what is it? I have a stack of great old non-af rokkor-x lenses that I'd like to play with and this is beginning to sound like a viable christmas present.
Also, another poster illustrated a very solid looking adapter for non-sony lenses and it appears to be close to a half inch thick (off the body). On epay there were several different looking models and some appeared to be quite thin...closer to a quarter inch thick, and only about $30. Would any of you have any guidance regarding what appears to be a smaller, cheaper adapter? I don't mind paying more for a quality item, but why the divergence between them?
Thank you all for a very informative thread.
Bimjo
Member
Wrong way around with the crop factor. M8 is a 1.3 I believe, the NEX is 1.5. To determine the crop factor (which is really a fov factor) multiply the focal length x crop factor. For NEX- 28/35/50mm lens x 1.5 crop factor = 42/52.5/75mm lens fov.
Lens adapter thicknesss is determined by the flange-to-sensor (film) register distance. For example, a Pentax has a 43.5mm (if memory serves) register distance. The adapter is 27mm thick to make up the difference between the NEX register distance and the Pentax register distance so the lens will focus correctly.
Other lens mount will have different thicknesses, depending on their register distance. M-mount register is much shorter than Pentax, so the adapter is much thinner.
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