Auxillary Lens for 1.6x Factor Correction??

[Mark_48]

Is there or would it be practical and feasible for a manufacturer to build an auxillary lens that would mount between a lens and camera body that would correct for the 1.6x sensor factor and also if left in place protect the sensor from dust contamination? After all Tele Extenders are available to step up a lenses focal length, why not the other way?

I realize there would be some potential downsides such as a light loss factor and added weight and size, but it sure would be nice to put a 28mm lens on and have it work as a 28mm and not be concerned about dust when I change a lens.

[jfrancho]

Yes, there is. $1000+ super wide zooms.

[defordphoto]

It's an easy fix. Instead of buying a 28, get a 16-17 and voila, wide once again. It is what it is and once you learn it, it's quite valuable.

[jyrgen]

I believe since TC-s result in light loss, such device (WC?) should actually give a light gain. However I believe such device is physically impossible (between the lens and the body), something to do with the distance between lens and sensor.

There are wide converters available for mounting to the lens front, meant to be use with video cams and PS-s. I'm afraid their quality does not match that of a SLR lens though.

[heffsarmy]

I used a canon 24mm with a canon WC-DC58N for powershot G5 screwed on the front of the 24mm lens and the results are pretty good, increases the wide angle a far amount...something to mess around with if you have one

[Jon]

There's such a correction lens built into the 1Ds and 1Ds Mk II. But what a cost!

Seriously, the 28 does "act like a 28". The perspective, the DoF at any given image magnification, it's indistinguishable from using the same lens on a full-frame camera. You just get a picture that's more tightly cropped. Or if you only use the 1.6x form factor, you won't even notice anything. I'm sure there are view camera users moaning about the loss of wide in their 200 mm lenses when they move to 2-1/4.

[caesars0331]

It's an easy fix. Instead of buying a 28, get a 16-17 and voila, wide once again. It is what it is and once you learn it, it's quite valuable.

This has nothing to do with any question he was asking.

[KJGradwell]

I understood that the 1Ds have a sensor 36X24 (ie the same as a 35mm. SLR)