Hi, I have a Nikon F4s in an Aquatica housing with a nikon 20-35mm AF-D 1:2.8 who knows wich diopter I need for this lens in the aquatica housing?
Rob
nikon 20-35 mmAF-D 1:2.8 what diopter
Started by sharky1961, Feb 04 2004 11:15 PM
14 replies to this topic
#1
sharky1961
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Posted 04 February 2004 - 11:15 PM
#2
Cybergoldfish
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Posted 05 February 2004 - 02:22 AM
Port details?
#3
sharky1961
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Posted 05 February 2004 - 01:47 PM
Hi cybergoldfish,
here are the portdetails. domeport 18400, portextension 18441.
Rob
here are the portdetails. domeport 18400, portextension 18441.
Rob
Nikon D800 in Seacam D800, Nikon 16mm, 16-35mm, , 60mm, 105mm,1.4 and 2x TC, 2x Sea&Sea 110a, 2x Seacam Seaflash 150
#4
Cybergoldfish
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Posted 05 February 2004 - 03:10 PM
Rob,
Check the Aquatica website. It suggests the correct dioptres on the spreadsheet.
Check the Aquatica website. It suggests the correct dioptres on the spreadsheet.
#5
sharky1961
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Posted 06 February 2004 - 05:50 AM
Hi cybergoldfish, I already chequed the aquatica website, there is no diopter listed for this lens/housing combination. There is a diopter listed for the aquatica F5 housing niko 20-35 lens combination. I already mailed Blake for 3 days about this subject but until yet no answer.
Nikon D800 in Seacam D800, Nikon 16mm, 16-35mm, , 60mm, 105mm,1.4 and 2x TC, 2x Sea&Sea 110a, 2x Seacam Seaflash 150
#6
Cybergoldfish
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Posted 06 February 2004 - 05:56 AM
It should be the same lens/dioptre/port combination. Camera is irrelevent.
#7
sharky1961
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Posted 06 February 2004 - 06:45 AM
Hi cybergoldfish,
No the f5 has other domeport(18405) and extensionring(18453) then the F4 domeport(18400) and extensionring (18441) so that is my problem.
No the f5 has other domeport(18405) and extensionring(18453) then the F4 domeport(18400) and extensionring (18441) so that is my problem.
Nikon D800 in Seacam D800, Nikon 16mm, 16-35mm, , 60mm, 105mm,1.4 and 2x TC, 2x Sea&Sea 110a, 2x Seacam Seaflash 150
#8
Cybergoldfish
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Posted 06 February 2004 - 06:49 AM
Is the F4 screw mounted ports then? The F5 is bayonet.
I'd have thought dimensionally they would be identical, it's the same lens afterall!
I'd have thought dimensionally they would be identical, it's the same lens afterall!
#9
sharky1961
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Posted 06 February 2004 - 09:19 AM
Hi, the F4has screw mounted ports
Nikon D800 in Seacam D800, Nikon 16mm, 16-35mm, , 60mm, 105mm,1.4 and 2x TC, 2x Sea&Sea 110a, 2x Seacam Seaflash 150
#10
Cybergoldfish
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Posted 06 February 2004 - 09:26 AM
Then that's the only difference... The dioptres will be identical! The part numbers are different only because of screw/bayonet mounting.
#11
davephdv
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Posted 06 February 2004 - 04:08 PM
Best guess would be +4. You often don't need one if you are not worried about close focus.
Dave Burroughs, Nikon D300, D2X, Subal housing, DS160 strobes
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Life is a beach and then you dive.
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#12
sharky1961
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Posted 07 February 2004 - 08:54 AM
the aqutica housing for the F5 usus a +3 diopter. what will happen if I use the wrong diopter and why do I need a diopter at all?
Rob
Rob
Nikon D800 in Seacam D800, Nikon 16mm, 16-35mm, , 60mm, 105mm,1.4 and 2x TC, 2x Sea&Sea 110a, 2x Seacam Seaflash 150
#13
Cybergoldfish
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Posted 07 February 2004 - 10:59 AM
It's down to the effect the port has on your lenses minimum focus ability. The diopter corrects this.
Yes, you will need it if you intend doing close-up work with good saturation.
Yes, you will need it if you intend doing close-up work with good saturation.
#14
echeng
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Posted 07 February 2004 - 11:03 AM
Rob: remember that a diopter will also limit how far you can focus your camera. If infinity focus on the dome's virtual image is closer than the maximum focus distance, you're still fine in all situations underwater (but now, you can focus closer to the dome).
#15
ascottj
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Posted 10 February 2004 - 07:18 AM
Hello Rob,
I also use F4's in Aquatica housings. Norma & Blake have been swamped. I can assure you that they are not purposely ignoring your questions. As Bob suggested, use the +3 diopter.
I wish you the best. Feel free to contact me personally if you can not reach Blake regarding a housing issue. If I am not on assignment, I will try to help.
God Bless,
Scott
I also use F4's in Aquatica housings. Norma & Blake have been swamped. I can assure you that they are not purposely ignoring your questions. As Bob suggested, use the +3 diopter.
I wish you the best. Feel free to contact me personally if you can not reach Blake regarding a housing issue. If I am not on assignment, I will try to help.
God Bless,
Scott
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[list]
[*]Aquatica Housings, Nikon D300 and D7000 Bodies
[*]Sea&Sea Strobes & TTL Converter, TLC & ULC Arms
[*]Scott Johnson
[*]SeaScapes Images
[list]
