80cf 1 Posted October 7, 2019 Looking for reccomendations for a dome port for cannon 8-15 fisheye on a nauticam housing and sony a7r3. I'm considering the zen 100 dp as well as wider 7-8 in domes. Thanks Share this post Link to post Share on other sites
Interceptor121 765 Posted October 7, 2019 If you want to go glass you have three options that I am aware Zen 100 Nauticam 140 Nauticam 230 For the type of shots I use the fisheye for the 230 is not practical and as it is heavy I would prefer an acrylic one for splits so I have chosen the Nauticam 140 on the basis that this lens is a fisheye zoom so a larger radius will help when the lens is at 15mm on my MFT set up. However on a full frame this may not be relevant as you have the bubble look and the diagonal fisheye Share this post Link to post Share on other sites
mackman 3 Posted October 7, 2019 How much of a difference is there in image quality when shooting a fisheye in a 140mm vs 230mm dome? Share this post Link to post Share on other sites
ChrisRoss 150 Posted October 7, 2019 (edited) Probably very little, fisheye and rectilinear optics are different and the fisheye has no trouble taking a 180deg curved virtual image and placing it on a flat sensor. - assuming that both have the entrance pupil placed at the centre of curvature of the dome. Big domes are used for rectilinear lenses as the radius of the virtual image is larger and you need don't need to stop down as much to bring both the corners and centre into focus. This is not as necessary for fisheye lenses Edited October 7, 2019 by ChrisRoss Share this post Link to post Share on other sites
Interceptor121 765 Posted October 7, 2019 (edited) Article by Dr Mustard https://wetpixel.com/articles/review-nauticam-140mm-dome-port-by-alex-mustard He says 140 mm is the minimum acceptable dimension for a full frame camera and 100 is only good for cropped sensor. 230mm will be better in corners but is much more bulky Edited October 7, 2019 by Interceptor121 Share this post Link to post Share on other sites
