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vbpress

Member Since 21 Feb 2013
Offline Last Active Nov 28 2017 02:29 AM
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Posts I've Made

In Topic: Strange Shutter Delay on DSLR???

01 April 2017 - 05:27 AM

Good Gary!
Digital camera are very complex, sometime too much complex.
Have you tested the new s&s m77 correction lens on your 16-35 behind the 240 dome?
I use this lens on 18-35/3.5-4.5 Afs G and it's a very good tool. The corner sharpness improvement is consistent.

Bye

In Topic: Strange Shutter Delay on DSLR???

26 March 2017 - 11:03 PM

I 've the same camera (2 different cameras) and the same housing system but I've never registered any delay in the shutter.
I shoot in af c and manual exp (and of course no auto iso), like you I use the red focus poit illumination. My choose for strobe connections are old nikonos wired cables, I'm very surprised by your problem. The Mdx-D800 is a well made housing, the push buttons have a long escursion and the dial control don't push on camera, comparing to the fitting of D300 in MDX d300 that is quite difficult due to a little tollerance in the camera body position.

Seriusly I don't understand what kind of diabolic mismatch cause your problem.

In Topic: Any hands on experience with Nikkor 20mm 2.8D ?

26 March 2017 - 10:35 PM

I 've employed the nikon 20af during the film era behin 8" aquatica dome port (no extension or diopter required) and the results were very good. Currently on sea&sea digital and 240 dome no extension need too but the image quality is not outstanding (today we have very hight expectations)
In other words the question is: why choose a cheap lens to fit in a very expensive housing system??
There are better solutions around, but anyway you don't be warried about extension ring, try your lens behind a big dome (8" is min, bigger is better), close aperture to f/11 and put deep blue in the corners like in the James photo.

Have a nice dive and great uw pictures.

ps
In the last edition of Wildlife Photographer of the Year a winning (terryfing beautiful) picture was taken by canon 5d in ikelite housing 8" achrylic ikelite dome and canon 20/2.8 lens. The corner sharpness is good!

In Topic: Nikon 10-24 & Sea&Sea

20 October 2016 - 01:53 PM

Hola Gus,
Yes the Marcelo' s combo is equivalent to Er20L+Er40L. The new S&S ring series are "L" named 'cause the security lock inside the ring, but they offer the same extension of SXER (20mm) and ER40 (40mm). Sea&Sea also has introduced a new ER30L (30 mm) and finally they offer a secure and varius extension ring system.
In any case don't trust in sea&sea lens chart, it's incomplete and contain mistakes.
I shot with MDX housings and I've tried different options with different lenses, in my experience with rectilinear zoom wide and dome port 240 (old type and new one) I've obtained best results when the front lens is quite complained with the base of the dome port. This empiric regula guarantee clear shots and also improoved using the new corrective lens Sea&Sea M77.
I give you the sets that I have used on dome port 240, most of those are not documentated in s&s lens chart

Dx sigma 8-16 --> ER40: quite good
FX Nikon 17-35/2.8 --> ER20 + ER40: quite good
FX sigma 24/1.4 Art --> M77 & ER40: very good
FX Nikon 18-35/3.5-4.5 G --> M77 & ER20 + ER40: very good

I suppose that Nikon 17-35 can give better results using M77, unfortunately last summer I crashed the lens on rocks (and me too) so I was unable to try it; I've purchased the cheaper Nikon 18-35 G and it surprised me giving great quality pictures BUT NOT BY SEA&SEA LENS CHART INDICATIONS!! S&S suggest to use only the ER40 in combo with M77 lens. I've tried it shooting very orrible pictures: internal dome reflections and poor sharpness in the corner. Great result, thank you S&s. I've added ER20 extension and everything changed: no inner reflections and hight sharpness all over the frame.

In your case I suggest the M77 and Er40+ ER20 , but don't miss to consider ER40+ER30 it could surprise you.
I hope to be usefull
By

In Topic: canon 11-24mm f4l usm

07 October 2016 - 10:51 PM

Sea&Sea produce a specifical kit (dome 240+extension ring+ zoom gear) to fit the 11-24 in MDX Canon Housing.

I'm a nikon user, I'm waiting to try the newest Sigma 12-24/4 ART in my MDX-D800, in case it will be possible.