Hey Dome Dudes

Just wondering what would be the best Fish Eye Lens for a Digital SLR for Full Dome?

I probably be using a Panasonic GH1 with 37mm converter or Canon 7D.

I'm based in London, I'd probably buy a cheaper one for experimenting but rent a good one for a final shoot.

Any ideas of where is good to rent and buy lens in London or online?

Help is much appreciated!


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Comment by Brian Wirthlin on December 10, 2010 at 10:10am

Panasonic's GH1 is a 4:3 format (17.3 x 13 mm sensor)

Canon 7D is an APS-C format (23.6 x 15.7 mm sensor)

35 mm full frame format (35 x 24 mm sensor)


If your goal is to shoot 180x180 degree fulldome images you'll want to avoid lenses that call themselves "full frame" fisheye lenses. "full frame" in this case means that the image fills the frame of the sensor. In other words the image is 180 degrees from corner to corner. There are lenses that produce a circular (180 degree diameter) image on the sensor, but a fisheye lens that produces a circular image on the Canon 7D's sensor won't fit on a GH1's sensor. In addition you'll want to consider that the resolution is related to diameter of the circular image on the camera's sensor - not the full resolution of the camera's sensor. Alternatively you can shoot multiple images and stitch the images together in post processing...

Comment by david mcconville on December 11, 2010 at 11:17am

Helena - Sunex has an inscribed fisheye lens for Canon mounts: http://www.superfisheye.com

Comment by Helena Doyle on December 13, 2010 at 12:57pm

Hi thanks guys this really helps. David do you think the quality of the Sunex lens would be as good as SIgma or Nikkon lenses or is a cheaper alternative? Is there a standard size lens for APS-C format DSLRs?





Comment by Helena Doyle on December 13, 2010 at 1:24pm

I've also been recommended the Peneng lens http://www.peleng8.com/ has anyone any feedback for these compared to the Sunex?



Comment by Helena Doyle on December 13, 2010 at 1:49pm

Okay one more thing! Anyone know the reason why this image is cropped?!




It's a Peleng Fish Eye on a Canon 5d Mark 2. 


Answer wins a star!

Comment by Brian Wirthlin on December 21, 2010 at 5:02pm

According to wikipedia - the Canon 5D Mark II sensor is 5616x3744 pixels - its video is subsampled using every third line/third pixel - this results in the "loss" of 84 "lines" at the top and bottom of the video frame.


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