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pablo

Member Since 07 Jan 2007
Offline Last Active Mar 23 2008 01:18 PM
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Posts I've Made

In Topic: Recommendations on Complete Rig Sale

08 February 2008 - 07:40 AM

Thanks - couldn't find my post this morning but looked around until I found it here.

Wonder what I should ask for the whole thing?

In Topic: Wet Macro Lens?

10 January 2008 - 02:56 PM

I put it all in the NLE and looked at it. I couldn't detect any except with the Ike W/A W-20 on top of the Inon 330 C/U lens.

In Topic: Wet Macro Lens?

09 January 2008 - 08:20 PM

Well thanks for the input. I'll be finding out here in about 3 weeks. It will be interesting to see.

In Topic: Wet Macro Lens?

07 January 2008 - 08:35 AM

Still wondering if some of you experts could mention what differences, if any, I might expect to see in vignetting and W/A imaging underwater v. the on-land tests I mentioned in the previous message.

In Topic: Wet Macro Lens?

06 January 2008 - 01:04 PM

Here's an update. I finally got the pieces (including one of those nifty small tripods everyone has been talking about here and getting a custom milled piece to mount it on my main horizontal housing bracket).

Unfortunately, due to schedule and other factors I wasn't able to run tests in the pool itself.

I did run some tests on dry land though (in my house, i.e.). Here's the list of components used:

- Sony SR1 AVCHD Camera
- Ikelite SR1 Housing (#6038.90)
- Ikelite W-20 W/A Lens
- Inon UCL-330 Closeup Lens

1 - I tested with just the Ikelite W-20 W/S lens on the housing, and saw no vignetting or edge distortion - which is the same I observed on my last dive trip where I first used the rig (all U/W shots were taken with the W/A lens). So the Ike W/A W-20 lens works well with this housing and camera combination, for any that are interested in knowing that. It does have the usual W/A distortion from the middle outwards - so if you test like I did with a square sign you see the difference, but that's what I'd expect from any W/A lens.

2 - I then tested with just the Inon UCL-330 closeup lens. That looked good at full wide, and zoomed in as far as I could go I could get focus around 6-8 inches from the lens. I saw no vignetting - even at full wide.

3 - Then I screwed the Ike W-20 W/A lens onto the Inon C/U lens. With that combination I got vignetting like crazy at full wide and quite a ways down into C/U zoom. However, I could zoom in tight and really get a monstrous magnification of something v-e-r-y small only 3 inches away! So that's something to remember if I were to come across a need for it.

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I have a big question for those with more experience: what might I expect to have seen different if I were to have run these same tests underwater?