Luminous Landscape Forum

Equipment & Techniques => Mirrorless Cameras => Topic started by: andyptak on June 07, 2018, 02:12:46 pm

Title: Sony a7r3 and Metabones using Contax lens.
Post by: andyptak on June 07, 2018, 02:12:46 pm

I just bought a Contax 28-85 and am using a plain Metabones - not Speedbooster adaptor - and I'm getting ridiculously low readings at ISO 200. Using f8 or f11 outside on a bright day I'm getting about 1/30 sec on aperture priority.

Do I loose a couple of stops with the adaptor?

Title: Re: Sony a7r3 and Metabones using Contax lens.
Post by: Telecaster on June 07, 2018, 05:20:55 pm

Hmmm…the adapter is just a tube. No light loss. What do the exposures look like histogram-wise? Post a sample or two if you can. Also make sure the adapter isn't forcing the lens to stop down all the way.

-Dave-

Title: Re: Sony a7r3 and Metabones using Contax lens.
Post by: andyptak on June 08, 2018, 02:03:04 pm

Don't I feel dumb. I discovered that I had accidentally set exposure compensation to +2. Answers why I thought I had lost two stops.

Title: Re: Sony a7r3 and Metabones using Contax lens.
Post by: NancyP on July 10, 2018, 04:04:07 pm

We all resemble that comment some days..... ;D