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Tom_Kline

Member Since 07 Nov 2004
Offline Last Active Today, 04:47 PM
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Posts I've Made

In Topic: Seacam 5DM2 use with Seacam Wideport, Fisheye

09 October 2017 - 09:48 AM

I use the Wideport quite a bit with the Canon 8-15mm lens for shooting at very close range (to zero distance from the port) and water too shallow for a larger diameter port. Submerging even the Wideport can be challenging. It is best to use smaller apertures.


In Topic: Do you like having a vacuum system?

07 October 2017 - 09:02 AM

I have Backscatter housing suckers installed on my Seacam housings for the Nikon D3X, Canon 1DX and Canon 1D4 so I must be sold to the concept! I draw the vacuum down to -10" to further compress the O-rings since I shoot a lot in shallow water. The internal pressure is thus about 2/3 of 1 atmosphere. See: http://www.backscatt...System-Bulkhead


In Topic: Any idea what is this???

07 October 2017 - 08:50 AM

It does look like a ctenophore. The resolution is too low to see refraction along the ctene which would be diagnostic. It looks damaged to me as well. They can be quite delicate so best not touch them.


In Topic: Introducing Nauticamís WACP - The Wide Angle Corrector Port: Discuss Here

30 September 2017 - 11:34 AM

Alex, you talk about using the Nauticam WACP with a Nikon 28-70mm lens.  Nikon's own website does not list any 28-70mm lens.  Please supply more details about the Nikon lens you used with this port

 

The f/2.8 lens is a discontinued lens model. http://www.nikonusa.com/en/nikon-products/product-archive/camera-lenses/af-s-zoom-nikkor-28-70mm-f%252f2.8d-if-ed.html   As well, Canon has discontinued L type (and others) zoom lenses that started at 28mm. Both companies replaced their f/2.8 28-70s with 24-70mm lenses. As well, both have zooms that range from 24mm (and 28mm) to longer focal lengths.

 

@ Alex and Ryan: I recall the older zooms had a minimum focus distances of 0.5m or greater - the newer ones focus to ~ 0.38m. How close were you able to focus the lens behind the WACP in terms of working distance? Would newer (pro type - gold ring or L) zoom lenses be able to focus closer (with the WACP) as well as primes as they have closer focus limits? If one needs to consider older lenses as well as current ones, both pro grade and not, the list is going to be long as suggested by the table so far. Then there are the third party lenses...

 

How bad is a 24-70 (any one of the various models from N or C) with the WACP? The newer lenses have improved optical technology as well as lens to camera communication. How does changing lens length such as when one zooms (i.e. gets longer in size) affect WACP functionality and performance?


In Topic: Nikon 8-15mm in the house!

12 September 2017 - 12:19 PM

Alex's shot has interesting colored vertical stripes at the top. The only thing arranged in rows or columns is related to the sensor, e.g., microlenses. Maybe worth testing with more camera models (different sensors). Topside as well to see if this is and interaction with the dome port such as reflections, e.g., off sensor through lens then off port back into the lens.