Cavision's fisheye adapter at DVinfo.net

Zulkifli Yusof · June 10th, 2006, 01:26 PM

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!

June 10th, 2006, 01:26 PM	#1
Zulkifli Yusof Regular Crew Join Date: Apr 2006 Location: Singapore Posts: 86	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

June 14th, 2006, 01:53 PM	#2
Frank Hool Major Player Join Date: Apr 2006 Location: Barca Spain Posts: 384	what do You mean? use it with slr photocamera? Last edited by Frank Hool; June 14th, 2006 at 10:51 PM.

June 14th, 2006, 03:37 PM	#3
Tim Johnson Regular Crew Join Date: May 2006 Location: London, England Posts: 101	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. __________________ (Wishes to be more informative and helpful than a nuisance)

June 15th, 2006, 08:52 AM	#5
Tim Johnson Regular Crew Join Date: May 2006 Location: London, England Posts: 101	did i mention a company makes a decent manual control fisheye for most mounts? __________________ (Wishes to be more informative and helpful than a nuisance)

June 15th, 2006, 02:09 PM	#10
Tim Johnson Regular Crew Join Date: May 2006 Location: London, England Posts: 101	http://photonotes.org/reviews/zenitar-fisheye/ google it for more info, its supposed to be reasonable __________________ (Wishes to be more informative and helpful than a nuisance)

June 14th, 2006, 10:51 PM	#4
Frank Hool Major Player Join Date: Apr 2006 Location: Barca Spain Posts: 384	I think, You will see huge distortion and falloff in edge areas.

June 15th, 2006, 09:05 AM	#6
Zulkifli Yusof Regular Crew Join Date: Apr 2006 Location: Singapore Posts: 86	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.

June 15th, 2006, 09:34 AM	#7
Toenis Liivamaegi Major Player Join Date: Nov 2005 Location: Tartu, Estonia Posts: 579	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.

June 15th, 2006, 09:54 AM	#8
Frank Hool Major Player Join Date: Apr 2006 Location: Barca Spain Posts: 384	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.

June 15th, 2006, 01:27 PM	#9
Forrest Schultz Major Player Join Date: Mar 2005 Location: Atwater, CA Posts: 246	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.

June 16th, 2006, 04:13 AM	#11
Zulkifli Yusof Regular Crew Join Date: Apr 2006 Location: Singapore Posts: 86	Alright guys, thanks!