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johnspierce

Member Since 14 Jul 2005
Offline Last Active Today, 12:43 PM
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Posts I've Made

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.


In Topic: Vacuum leak detector question

24 March 2014 - 07:06 AM

I have a vacuum system myself and the housing opens even without releasing the vacuum 

 

Hmm.  That's surprising.  When I pull my housing down to -10hg, I absolutely cannot open the housing.  I can release all the latches, pick it up and shake it hard and the back will not come off.  I didn't do that with the camera inside by the way :D  I might be able to pry it apart with a screwdriver (I'm not going to try that!), but my housing is absolutely "sucked" together and cannot be opened without releasing pressure first.  

 

Also, I can rotate the port if I put a lot of effort into it, but I cannot pull the port off when it's under negative pressure.

 

I'm using Backscatter's airlock system on an Aquatica housing, what housing / vacuum system are you using?

 

JP


In Topic: Nikon 1 V3

21 March 2014 - 01:44 PM

I had the same idea with buying the V1.  Same battery as the D7000 and D800.  Same lenses with the converter.   It would make a lot of sense going back and forth from small to large kit.  In use however, the 1 series is simply a half-baked concept.

 

We now know other than having more pixels, the IQ is pretty much the same as the previous sensor and is considerably inferior to M4/3.  (see photo below with DXOMark's comparison to Olympus sensors).  I have both an Olympus EM5 and an EPM2 and either one is quite noticeably better than my V1 in terms of image quality.

 

As to how those other lenses work on the Nikon 1, in my experience I'll say pretty well.   One issue is it only does spot focus/metering, but that's not too big a deal.  The 105 VR works quite nicely with it as does both my 35mm and 50mm 1.8's.   I never tried the 10-17, should've done that.  Is a matter of fact, I was pretty happy with the full size Nikon lenses on the V1.   The 60mm macro works even better than the 105.  One thing about the 1 series is all of the images, even at 100 ISO have a "grain" to them.  Some people might say the images are noisy.  It's not too unpleasant, but it's certainly not as crisp as my other cameras.

 

It's the standard lenses that are a let down.  They aren't horrible, just not stellar which is kind of what I expected from Nikon. And a 105 or a 70-200 feels too big on it;  doesn't balance well.

 

Last year I took the V1 to Switzerland with the standard lenses, my 50mm 1.8 and 60mm 2.8 and no other camera.  It certainly did the job and I'm still happy with the photos.

 

I won't say the Nikon 1 series is a horrible camera.  Just don't use it beside an EM5 with some decent lenses because then all of it's deficiencies become apparent.  The images from the 16mp Oly sensor really are hugely better than the Nikon 1 series in my opinion.  Lens selection is much better too and suprisingly, an Olympus EM5 with a 25mm 1.8 lens is almost the exact same size as the V1 with the 18mm 1.8 on it.  

 

Just my opinion.

 

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