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johnspierce

Member Since 14 Jul 2005
Offline Last Active Yesterday, 12:34 PM
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Posts I've Made

In Topic: What setup for good rig buoyancy with Aquatica D7000?

27 June 2014 - 10:26 AM

Thanks John, sounds good. I guess I must have regular size stix floats at the moment. 

 

Just to be clear - you don't need a float belt around the macro port with this setup?  If so it seems like less than I have now as the port float belt has 7 or 8 floats on it.  (I have the old 105mm and the manual focus port if that makes a difference?).

 

Yes, I do not use the float belt with macro setup.  6 jumbos and two regular stix floats balance the rig nicely.  I'm sure the float belt works well too, I've just never tried it.

 

Like you, I went from Ike DS-160's to Z-240's.  It's surprising how much more negative my rig is now.  I used to get away with 2 Jumbo stix on each side with the 8" dome.  I do like the Z-240's better;  learning curve was a bit higher, but they are much more flexible in use in my opinion.


In Topic: What setup for good rig buoyancy with Aquatica D7000?

26 June 2014 - 07:45 AM

On my Aquatica D7000/Z240 kit, this is what gets me to just very slightly negative:

 

- With the 8" Dome port, Tokina 10-17 --- 3 jumbo stix floats on each arm

- With the Macro flat port and 105mm -- 3 jumbo stix floats on each arm and I add 1 large stix float to each arm.

 

I can get away with just the 3 jumbos on each side with the macro setup, but sometimes my arm gets tired.   If I forget and leave the 1 addtl large float on with the dome it's kindof "floaty" - slightly positive.

 

Set up like above, I can toss my rig up into the water column and it will gently float down.


In Topic: Going from S100 to M43, signifigant upgrade?

09 April 2014 - 01:17 PM

Interceptor, are you going to turn this into another thread where you will continually and laboriously argue with anyone who posts a different opinion than yours?

 

If so, this thread is now a waste of bandwidth, just like the vacuum thread.  


In Topic: Going from S100 to M43, signifigant upgrade?

08 April 2014 - 12:18 PM

Yep, EPM/EPL in an Olympus housing is definitely smaller and lighter than a D7000 DSLR.   Plus, the 4/3 sensor is quite a bit better than anything you will see in a P&S system.  

 

The Olympus EPM2 (currently on firesale in many places) has the same 16mp sensor as the EM5 Olympus which is quite excellent and it's *tiny*.  I bought one a few weeks ago for a quick grab-n-go camera for $240 -- a screaming deal!  Unfortunately, there is not a housing available for EPM2, you would have to go with the EPL5.

 

Plus, the size of the ports and lenses are about half the size of DSLR ports/lenses.  I would definitely recommend you go for the newer PEN systems with 16mp vs. 12mp since the price is not that different and the sensor is quite a bit better.

 

None of this is that important under water since a properly balanced DSLR handles quite easily, but if your goal is to have a much smaller, lighter load for travel, it's hard to go wrong with M43.  Didn't Alex Mustard win some sort of award last year shooting Olympus EM5?

 

http://www.nhm.ac.uk...h-sunbeams.html

 

 

Here's a pic showing size differences between P&S / M43 / DSLR from Reefphoto:

 

3sizes.jpg

 

To the original poster - is Canon S100 to M43 a significant upgrade in image quality?   Yes, definitely.


In Topic: Vacuum leak detector question

24 March 2014 - 07:13 AM

BTW, I have done many giant strides with an Aquatica housing while snorkeling with Whale Sharks.  I tried to hold it high near my head to minimize the surface shock, but had no issues at all. I'm sure the Nauticam is equally good for doing entries with housing.  My opinion is it will be even safer under negative pressure.  It would take a helluva shock to knock a port loose with a vacuum system and I have actually never seen a flood caused by a "damaged" housing/port.  

 

It's always an o-ring not seated or a port coming unscrewed, both of those occurrences are exactly why you want a vacuum system.