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divegypsy

Member Since 07 Sep 2003
Offline Last Active Yesterday, 09:04 AM
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#343079 Vacuum Leak Test Update

Posted by divegypsy on 09 February 2014 - 02:03 AM

If the conditions are very humid and you think you might have condensation problems in your housing, all you have to do is "flush" out the housing with air from your scuba tank just before you close it.  Hold the two housing halves almost together and then blow air into the housing with an air blower that attaches to you LP hose.  Then close the housing quickly and use your vacuum device.

 

Fred




#339106 Nikon AF Micro-Nikkor 200mm f/4 D IF-ED Lens

Posted by divegypsy on 06 November 2013 - 01:49 PM

Used alone, the 200mm Micro-nikkor focuses down to only 1:1, the same as most other true macro lenses offered by Nikon, Canon, Sigma, and other lens manufacturers.  But compared to a Nikon 105mm, the 200mm would require almost twice the working distance, the water between the front of the housing port and the subject.  And too often this extra water distance would result in a less sharp image.  The advantage of using this lens with T6 close-up lens is that the water distance is reduced to a workable 8-18" while the maximum magnification is increased to 1.8x life-size, a very significant increase over the1.0x of the lens alone.  And does this while maintaining a maximum aperture of about f4 to f5.3 for focusing accuracy and viewfinder brightness.

 

Fred




#335692 TTL Anonymous

Posted by divegypsy on 12 August 2013 - 12:19 AM

So sorry Ted, my shooting style is such that I wait for a shot that really appeals to me rather than just shooting a lot of things. If the number of shots taken is how to measure success, I'm a failure. Sorry if you find these flat and unappealing as you did with my shots posted to illustrate the versatility of the 70-180 Micro-nikkor zoom for Valeria.

 

The purpose of my post here in strobes and lighting three days ago was primarily to say that I thought Ikelite's claim of more flashes and faster recycles with the new Lithium ion battery packs appeared to be true.  I'll attach a few of my new Komodo shots, all taken with TTL, which show some of the results of what was my first underwater experience with the lithium powerpacks and with the D800 in my new Subal housings.  

 

Nothing unusual here, just the usual Komodo suspects.  But I'll keep in mind the old photo cliche, "If your friends don't like your pictures - find new friends!" 

 

Fred

Attached Images

  • Mantas.jpg
  • Lionfish.jpg
  • Fusiliers & surgeonfish.jpg
  • Surgeonfish school.jpg
  • Sponge, crinoids & sun.jpg



#335111 Macro 60 or 105mm on a D800 + (maybe) TC 14-EII or TC-20EIII

Posted by divegypsy on 31 July 2013 - 10:30 PM

Tim, You are absolutely right. The flexibility of a zoom lens like the 70-180 is indeed a curse. In the old days, when all I had was either a 60mm or 105mm, and I didn't get the shot, I could always say, "but I had the wrong lens on my camera." Or, "The critter just wouldn't let me get any closer." Or, "The vis was so mediocre I couldn't back up far enough to get the whole thing in the picture." But these days magazine photo editors don't accept such excuses. And when you come back with those excuses instead of the "shot", they find someone else to send to places like Palau or Raja Ampat for them. Someone who they know will get the "shot", even if it means shooting with a 70-180mm. Someone who can deal choosing both a good shooting angle AND a good framing. At the same time! Oh, the curse of trying to make your living as a fish-paparazzi in a time of such optical richness! Fred




#328726 Tokina 16-28 f2.8

Posted by divegypsy on 27 March 2013 - 06:30 PM

I just looked up the photozone test report.  This is one paragraph from their "VERDICT" of the lens.    http://www.photozone...-tokina162828ff

 

"Unfortunately there may be a hair spoiling the (optical) soup here - quality control. As mentioned we purchased three lens samples for testing, two in Nikon and on in Canon mount, and all three showed some centering issues. The initial Nikon variant was so poor that we had to cancel the testing procedure. The second sample, used for this review, was better, but still suffered from slight decentering at the long end."

 

Fred




#313313 Nikon announces the D800

Posted by divegypsy on 21 July 2012 - 07:56 PM

Hello Alexis,

I've bought several D800's but don't have a housing yet. Shot with the D700 underwater on my most recent trip - Bali and South Australia. One of the reasons I may switch to the D800 for underwater use is to cut down on the gear I would have travel with if I continue to shoot underwater with the D700 and topside with the D800. The two cameras use different batteries, which means different battery chargers. And back-up's for those chargers and back-up camera bodies of each type. I also prefer shooting with only one kind of camera body so that when I reach for a particular control button on the camera it is always the same place.

You should also keep in mind that how much difference you would see between the D700 and D800 depends a lot on what you want to do with the pictures. The higher dynamic range of the D800 will be most apparent and advantageous when shooting subjects with high contrast, such as having the sun in the picture. The higher resolution is likely to be visible only if you make very large prints of the full frame or make fairly large prints from a small portion of the whole image area. The theoretical maximum resolution increase, 1.67x, will only be realized if you shoot with top quality lenses at their optimum apertures, which in many cases may not give you the depth-of-field you want or need for the picture.

If you already own a D700, but not a D800, you will probably be able to save a very large amount of money on your underwater kit by buying a used housing for your D700 vs having to buy a new housing and a D800.

Fred