'Cosina is preparing an RF mount lens with electronic contacts'

koenkooi · Feb 19, 2023

If I read the google translate correctly here
https://asobinet-com.translate.goog...l=auto&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp , Cosina is preparing RF-mount lenses.

I suspect they will be manual focus lenses, but with an electronically controlled aperture. With electronic contacts the lens can also report its focal length so that IBIS 'just works'.

AlanF · Feb 19, 2023

It's described as a "Large-aperture single-lens reflex lens". Perhaps, someone should tell Cosina that the RF-mount is for mirrorless not SLR.

Del Paso · Feb 19, 2023

"Google translate " always reminds me of a French language Zorki 4 owners manual stating:
" You dare not put camera into side of the big sun, there is risk of damage shutter"
(Something like this or even worse...)

dolina · Feb 19, 2023

koenkooi said:
If I read the google translate correctly here
https://asobinet-com.translate.goog...l=auto&_x_tr_tl=en&_x_tr_hl=en&_x_tr_pto=wapp , Cosina is preparing RF-mount lenses.

I suspect they will be manual focus lenses, but with an electronically controlled aperture. With electronic contacts the lens can also report its focal length so that IBIS 'just works'.

Has Cosina ever release any EF lenses that had full electronic control hat matches any of Canon's consumer lens?

Del Paso · Feb 19, 2023

dolina said:
Has Cosina ever release any EF lenses that had full electronic control hat matches any of Canon's consumer lens?

Could be...
Cosina is known for producing lenses for various Japanese and European customers. Zeiss, for instance.
So, there is a chance they produce(d) "Canon" lenses for Canon. But never as Cosina.

Del Paso · Feb 19, 2023

AlanF said:
It's described as a "Large-aperture single-lens reflex lens". Perhaps, someone should tell Cosina that the RF-mount is for mirrorless not SLR.

According to the official Cosina teaser, there will be one lens for RF, one for DSLR, one for Fuji X and a high speed SLR lens.
So, they certainly know the RF stands for mirrorless.

AlanF · Feb 19, 2023

Del Paso said:
According to the official Cosina teaser, there will be one lens for RF, one for DSLR, one for Fuji X and a high speed SLR lens.
So, they certainly know the RF stands for mirrorless.

Del Paso · Feb 20, 2023

AlanF said:
View attachment 207659

Yes, the "large aperture single -lens reflex lens could be for Pentax or Nikon's DSLRs.

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'Cosina is preparing an RF mount lens with electronic contacts'

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