Olympus 90mm and 1,4x TC

[FrancoisC]

Hi,

I have an Olympus EM1 mkII with an Olympus 90mm macro lens.

In a Nauticam housing with N85 Macro Port 120 dedicated part.

 

Does anyone try this with the 1,4x teleconverter and N85 Extention Ring 17 (as specified in port chart) ?

 

in which mode in the lens ? Normal, 2x  (S-macro) ?

 

Any input will be welcome 🙂 

 

[Chris Ross]

I have used the combination on land - I don't have the port for it to try UW.  AF is slightly slower but works fine mostly and image quality seems fine.  I shoot at f11 usually.  I probably have some reasonable on land samples I could share.  I think I recall 1 or 2 WP people mentioning they shoot with it UW, perhaps they will chime in.

Here is a sample with the 2.0x: 

 

https://www.facebook.com/groups/wetpixeluw/posts/10158868336166017

 

Some people using the lens on this WP post:

 

https://wetpixel.com/forums/index.php?/topic/70464-om-system-90mm-macro-announced/page/4/

[FrancoisC]

Thanks Chris. 
not sure I will be able to do some tests, needing to find a 17mm extention ring...
Anyway I have first to try to get some good results without TC.

 

From my first tests (in pool), it seems a 1cm subject will fill the whole image in S-macro mode...

 

Trip to Alor, Indonesia planned for June and weanwhile in fresh water at La Gravière du Fort, Alsace France.
Will post images (If I can get good ones 🙂 )

[bvanant]

Why shoot with the 1.4 rather than add a low power diopter on a flip? In my hands on the OM-1 using the Oly 1.4 tele autofocus is noticeably slower.  I haven't tried it that way underwater (can't find any extension ring shorter than 22 mm)

Bill

[FrancoisC]

Hi Bill.

I tested with a Saga +10 and a Noodilab Moby, but with no benefits.

Basically no better magnification, but very short working distance.

I still have to test with my wife's Subsee+5

 

As previously written I already have to master the lens w/o additions...

[FrancoisC]

I have done some tests in the pool.

Tested, Subsee +5, Saga +10, SMC1, Noodilab.

Compared to X2 S-macro mode, I could get for some of them nearly same magnification, but in all cases with the cost of a reduce working distance.

No benefit at all.

A sample of result with the 90mm lens alone in X2 S-macro mode.
Working distance is around 4-5 cm.

This is the head of a Lego minifig. Width is around 10mm, filling the frame with no crop. Not so bad...

null

Edited February 2 by FrancoisC

[Mathieu Cornillon]

I think her mascara is not waterproof…