1.4x expander with s35 anamorphic lenses?

[Dominik Bauch]

Has anyone used the Atlas lens co. 1.4x expander with anamorphic 2x lenses on a large format camera?

I’m looking to use 2x Cooke anamorphics on a mini LF. I can get away with many of the focal Lengths but an expander would help clean up some of the excessive funk that creeps in and make them fully useable. 

Any downsides to doing this? I can live with the 1 stop light loss - added weight and loss of lens data is a bummer but not a deal breaker. 

 

[Dom Jaeger]

I don’t know the Atlas expander, but if it’s a low budget item I would expect there to be some optical degradation. Even high-end expander/extenders tend to cause a bit of that, simply by magnifying any faults a lens has, as well as introducing extra aberrations. You’ll need to test yourself to determine if the funk of the full image circle is worse than the expanded image. 

Other than that, you know the issues - one stop light loss, no lens data. You will also find the lens focus marks will be out by about an inch and a half, which is more of a problem at closer distances.