Canon A 40

[deep_ocean]

Greetings abd salutations,

I'm a happy owner of A 40 + UW housing. So far I've used it mostly on surface and the housing was used on a couple of canoe trips, as a just-in-case measure. In two weeks I'm going for vacation to 1000 islands and I'm plannning to dive and take pics UW. My main questions are regarding "best practices". I know there is an issue os moisture captured inside the housing and fogging up the lens once the temp. drops under water. How do I prevent that?

Any other tips are welcome.

Thanks,

deep_ocean

 

[Grajan]

on "dessicant" or "silica" in the photography forum you will find a TON of information.

If that does not do it report and I will give you more info.

 

[deep_ocean]

Thanks Grajan,

Will search for those.

Still, if you guys can think of anything (maybe specific to A 40) I'd appreciate it.

deep_ocean

 

[Grajan]

Which I think must be pretty similar.

This thread has some great setup tips I was given.

I'm off to Bonaire at the same time as you.

Have fun.

 

[deep_ocean]

I really love the one (someone else pointed it already) with a snorkler over the crack in the rocks - teh composition, the colors...

Your camera is approximately twice as good as mine (4M vs. 2M), but I guess the general idea is teh same.

The colours. Have you ised any strobe? Or were you able to correct it all in Photoshop? The snorkler shot seems to have captured all the colours correctly.

Thanks again,

deep_ocean

 

[Grajan]

I do not use a strobe and had good success with this internal flash. All correction - if any - was done in PS.

Remember the snorkelling ones were in shallow water!

This shot was taken at about 70' on the Rhone - again with ambient light and color correction:

This shot was taken at the same depth using the internal flash (spot the diver?):

As for the resolution - I only used medium res due to lack of storage so there should be little difference there.

 

[deep_ocean]

Again, great pictures!

I really like the divers with the kelp (?) in the background. The blue works so well in it.

Would you have a copy of the same picture before auto-leveling it in PS? I'm just curious how much PS has altered the original balance.

Thanks again,

deep_ocean

 

[Grajan]

Before:

After:

BTW. The verticals are the old deck timbers from the mail steamer.
She is lying on her side.

There is more info here.

 

[Dee]

I order silica paks from Preserve Smart. It's not that expensive and I especially like the crystals that change color as it gets saturated. The first time I used these, I realized I was replacing the silica paks way too often and throwing them away. A few minutes in a slow oven or microwave will recharge them.

Some folks suggest going to pharmacies, shoe stores, etc. to get the free ones but I always wonder just how much moisture they have already absorbed and if they are doing my very much good.

The small price is worth the piece of mind for me.

 

[deep_ocean]

Grajan, thanks for the pics. Hpefully in a few weeks I'll have my first UW shots to post.

Dee, thanks for the tip. I'll probably order from them.