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-   -   Cavision's fisheye adapter (https://www.dvinfo.net/forum/alternative-imaging-methods/69278-cavisions-fisheye-adapter.html)

Zulkifli Yusof June 10th, 2006 01:26 PM

Cavision's fisheye adapter
 
I've been looking at Cavision's fisheye adapter for mini-dv: http://www.cavision.com/optics/DV/PFA03X58.htm

and I've been wondering....what happens if I attached it onto a 35mm SLR camera instead? I know for sure the effect will be different because the adapter is meant for use with 1/3" cameras.....so how will it affect a 35mm SLR?

Thanks

Frank Hool June 14th, 2006 01:53 PM

what do You mean? use it with slr photocamera?

Tim Johnson June 14th, 2006 03:37 PM

im guessing one of the side effects would be possibly be that all the flaws of the glass and design will be far more noticable, as a dslr has much higher resolution then even an HD cam.

Frank Hool June 14th, 2006 10:51 PM

I think, You will see huge distortion and falloff in edge areas.

Tim Johnson June 15th, 2006 08:52 AM

did i mention a company makes a decent manual control fisheye for most mounts?

Zulkifli Yusof June 15th, 2006 09:05 AM

Thanks Frank and Tim for replying. I was more concerned about the area of image that will be formed on a 35mm format. Would a lens designed for 1/3" cameras form only an image of that size and not be able to fully cover the 35mm area? Im thinking of using it with a Nikon lens on my SLR.

Toenis Liivamaegi June 15th, 2006 09:34 AM

Almost all motion picture lenses project image smaller than 35mm still photography frame. In best case you get massive vignetting or you just end up with images smaller than 35mm frame.

I quess you can always buy some screw-on fisheye lens from eBay.
Or go with alternative Zenitar 16mm 2.8 fisheye lens.

Screw-on fisheye http://cgi.ebay.com/Black-WIDE-ANGLE...QQcmdZViewItem

Zenitar fisheye http://cgi.ebay.com/Lens-Zenitar-N-f...QQcmdZViewItem

T.

Frank Hool June 15th, 2006 09:54 AM

Imageplane size is lens main characteristic. If You use any bigger area behind Your lens theres no guarantee about anything. Same time are given in characteristics sheets vignetting and distortion dimensions. Those are directly related with imageplane size.
Something like this: the bigger is imageplane the harder is to produce(read: it takes more glass) lens which has no artiacts in edge areas.

Forrest Schultz June 15th, 2006 01:27 PM

Zulkifli, yes, if you put a lens that is meant to be used for a 1/3" sensor, then on a 35mm sensor, your only gonna see a circle in the middle of your film with the image. and it will be small. so it would be a small area in the center where you see your image, and everywhere on the film would just be black.

Tim Johnson June 15th, 2006 02:09 PM

http://photonotes.org/reviews/zenitar-fisheye/

google it for more info, its supposed to be reasonable

Zulkifli Yusof June 16th, 2006 04:13 AM

Alright guys, thanks!


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