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Showing results for tags 'sharpness'.
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Hi all, I've recently just upgraded to a Nikon D800 with Nauticam housing. I've only done a few dives with the new rig so far, unfortunately in pretty terrible viz, but have noticed a couple of issues with my wide-angle set-ups: - Nikon 17-35mm, & Nauticam 9" optical glass dome & 70mm ext ring. - corner sharpness is quite poor. - Tokina 10-17mm & Kenko 1.4x teleconverter, with Nauticam mini dome (for the 10-17) & 20mm ext ring - slight vignetting visible at its widest focal length. Is anyone using the same lenses as me but with different dome ports? how do you like the results? Is anyone using a Nikon 16mm fisheye on a D800? How does it compare to a 10-17 with a 1.4xTC? The 2 images attached: Nikon 17-35mm, Nauticam 9" optical glass dome & 70mm ext ring, 17mm, 1/200s, f9, ISO160, natural light. (The 2nd image shows the blur in the bottom-left corner of the 1st image). My general question to any D800 users (ideally, Nauticam users too) is, which wide-angle set-up do you find gives you the best results in terms of corner sharpness? Any advice is much appreciated, Cheers, Christian note to Alex Mustard: i read in a previous D800 post last year you may have written a piece discussing wide-angle lenses and domes for FX cameras? If you have, i'd love to have a read as i'm sure you have the magic answers! thanks. -
Hey Guys, I am currently shooting with a 5D mkiii in Ikelite housing using the 5510.40 port and 8.5 inch dome with canon 16-35mm mkii lens which is required to be mounted after the camera is fastened within the housing due to the standard port being too small in diameter. My current issue is that with this method the Lens sits too far into the Dome and correct me if im wrong but im pretty sure that this is causing the Lack of sharpness mainly in the corners but i find that the image in general lacks a slight sharpness. So i am now looking at purchasing the wider Zen port which is optimised for the 16-35mm mkii and allows it to fit into the system properly. http://reefphoto.com...roducts_id=6516 Another thought was purchasing a +2 diopter to increase sharpness again. Does anyone have experience with this set up and the Zen port and if so did you find the lens sat properly within the dome and produced reasonable image sharpness? Also does anyone have experience or could lend any advice on the addition of a +2 diopter. Is it worth it? Any info would be much appreciated! -
Hey Guys, I am currently shooting with a 5D mkiii in Ikelite housing using the 5510.40 port and 8.5 inch dome with canon 16-35mm mkii lens which is required to be mounted after the camera is fastened within the housing due to the standard port being too small in diameter. My current issue is that with this method the Lens sits too far into the Dome and correct me if im wrong but im pretty sure that this is causing the Lack of sharpness mainly in the corners but i find that the image in general lacks a slight sharpness. So i am now looking at purchasing the wider Zen port which is optimised for the 16-35mm mkii and allows it to fit into the system properly. http://reefphoto.com/shop/index.php?main_page=product_info&products_id=6516 Another thought was purchasing a +2 diopter to increase sharpness again. Does anyone have experience with this set up and the Zen port and if so did you find the lens sat properly within the dome and produced reasonable image sharpness? Also does anyone have experience or could lend any advice on the addition of a +2 diopter. Is it worth it? Any info would be much appreciated!
