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wydeangle

Member Since 25 Mar 2008
Offline Last Active Jun 23 2015 07:24 AM
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Posts I've Made

In Topic: Sony AX100 autofocus problem

23 June 2015 - 07:24 AM

Drew,

 

Thanks. I think I may have identified the problem: the operator.

 

Let me publicly embarrass myself by saying it could have been in MF when I thought I had it switched to AF :nea:

 

Not sure - going diving at the bridge next month so I can test the theory.

 

I need a monitor that has no whiteout when glare hits it, and has a few vital bits of info that blink. I sure miss my Pentamirror.

 

More next month, or Aug for sure,

 

Tom


In Topic: Sony AX100 autofocus problem

22 June 2015 - 12:23 PM

kc_moses,

 

I understand the hunting focus when contrast is low. That does happen.

 

My real concern is that the camera focuses on the background - perfectly sharp - when a fairly good contrasting subject occupies the center third of the frame. The camera does not focus on the subject, but instead focuses on the background at the edges of the frame.

 

This happens with the flat port and with the macro lens flipped in front of the flat port.

 

Frustrating...

 

Tom


In Topic: 4K screen capture -> nudibranch eggs

25 May 2015 - 05:57 AM

kc_moses,

 

Thanks for the embedding - I was just coming back to learn how to do it.

 

The flickering is sunlight and waves ten feet above. I don't know what to do about that except maybe bring down an umbrella and use lights LOL I have lights but did not use them.

 

I was zoomed in, but not quite far enough as you can see from the vignetting. I'm in maximum learning mode as it was the very first time I've ever tried to use a diopter.

 

One thing that kept me from zooming more was the loss of focus if I zoomed in more. If I moved back a bit I might have done better - I'll try that next time. There's a pretty narrow depth of field with the +10, so distances are kind of touchy; a little more zoom, or a little more distance and things get out of focus in a hurry! I also have a +5 which hasn't been tried yet. Not to mention the surge...

 

Nudibranchs abound at "the bridge." If you look for Caribbean Sea Slugs at Amazon, you'll see there are quite a few there. One co-author is my source for the ID above. Not sure but I am under the impression there are more than 100 species of slugs and nudis at the bridge. More than 300 species of undersea critters have been documented there including seahorses, frogfish (we saw seven there last week) blennies of all descriptions and and and

 

I predict you'll like it!

 

Tom


In Topic: ULCS Tray & Handles - TLC Arms, Clamps & Floats - STIX - Fantasea

11 April 2015 - 04:55 PM

You have a PM RE: Item #6

 

Tom


In Topic: Red gel on underwater video light

01 March 2015 - 08:12 AM

Roger,

 

I second (or third) the idea that shooting with red light at night is problematic, so I've arrived at a compromise that I believe works more often than not.

 

I use red filters on my video lights, keeping them on low power while I am looking for critters. This seems to spook them less than the white lights.

 

I have previously white balanced with my lights on medium power (or whatever power I intend to use) without the filters.

 

When I find a subject, I remove or rotate the filters out of the way and do the shooting.

 

Whether this really helps, or just makes my life more complicated I couldn't say - I do think it helps sometimes.

 

Tom