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Member Since 01 Apr 2002
Offline Last Active Mar 19 2018 08:45 AM

Posts I've Made

In Topic: Olympus 60mm lens focus limit switch with GH5

19 March 2018 - 08:48 AM

I don't think so, the switch is mechanical. You might be able to modify a port to allow you to poke that switch though.


In Topic: Effect on focus distance of being underwater

12 March 2018 - 09:14 AM

I think all of the good underwater lenses use only air/glass interfaces for magnification. The water glass interface is planar then glass/air so magnification is the same in air as in water. Working distance for the CMC clearly gets shorter not longer.



In Topic: Need Saga +25 info

10 March 2018 - 03:28 PM

Try it on your kitchen table. I think you will not be as happy as the calculations suggest. 


In Topic: Effect on focus distance of being underwater

10 March 2018 - 03:25 PM

The correct answer is it depends on the lens you are trying to magnify.

For example with the OLY 60 macro lens you have a 98 mm working distance without the diopter and a 22 mm working distance with the CMC (I don't have the saga data)

With the Panasonic 45 macro you have 71 mm working distance without and 17 mm with the diopter 

with fixed lens compacts you can get more working distance but with most micro 4/3 lenses you will indeed get less. A lot less.

On the sony RX100 mark 2 you will get a working distance increase of about 1.4 so you should be OK.


In Topic: transport of spare parts, tools etc.

06 March 2018 - 09:00 AM

think tank airport extreme. Just hope they don't weigh it, it is like 14kg.