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junior5

Member Since 04 Feb 2010
Offline Last Active Mar 27 2015 02:15 AM
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Posts I've Made

In Topic: Second thoughts about vacuum systems

26 March 2015 - 08:56 PM

more water would have to enter the housing the deeper you go in order to change the light.  i mainly rely on my green light indicator before getting into the water.  i think it is helpful before each dive.  a port or something could have broken a seal between dive spots.  the green light being on reassures a seal hasnt been broken


In Topic: Second thoughts about vacuum systems

26 March 2015 - 07:08 PM

i would think the o-rings are designed for negative pressure inside the housing.  when diving the pressure inside the housing should decrease thus acting like a vaccum.  i opted for the vacuum system on my new housing to reasure i dont have any major leaks from the port and other potential leak sights to prevent a major flood.   im thinking a positive pressure system would be really complicated and the pressure would equalize at some depth point.


In Topic: 5D3 Lenses and Ports

06 March 2015 - 06:21 PM

will for sure be gettting the f4 version.  i ended up ordering the sea and sea 10 inch dome.  might order the zen down the line.  price was the main reason i went with the sea and sea.  ill try and post some pics when i get out to dive.  might be a couple weeks.  ill be using the 8-15mm for a month or so until i purchase the 16-35 f4.

thanks for all the info


In Topic: 5D3 Lenses and Ports

03 March 2015 - 05:13 PM

thank you for the reply.  you answered my biggest question!! the f4 or f2.8.  it is exactly the answer i want to hear.  im most likely going with the zen dome. sound a bunch of threads about acrylic vs glass.  not sure why i hadnt thought about search for that until now.  lol

 

thanks again


In Topic: Canon 5dS and 5DR

17 February 2015 - 09:23 PM

since the 5ds/r has a crop mode of 1.3 (30+ MP) and 1.6 (20+ MP) and a pixel density the same as the 7D II it seems like filling the frame would be easier because a single macro lens could become 3 lenses. same goes for a wide prime lens. a canon 8-15 would give all kinds of options for filling the frame.  it seems like one housing with 2 cameras, 5dIII and 5DS, would give you several options to chose from as long as the bodies are the same. im in the process of selling my 7D, lenses and housing so i can buy a housing for a 5dIII and the 5DS as long as it fits. Since the pixel density stays the same would the diffraction differ at differnet crops?  which WA and macro lens would yall want?