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buddy

Member Since 20 Jan 2004
Offline Last Active Yesterday, 12:49 AM
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Posts I've Made

In Topic: Group Cluster Focus Points - Macro on Nikno

11 December 2018 - 02:36 PM

i use group mode with AF-C only for wide angle when action is involved, e.g. shark shots. IMO it doesn't really work for macro, best is single servo - single focus point and focus field moved to the "sides*. Focus on the eye and release. Others tried also with AFC and 3D-mode, but that did not work for me either; the 3D selected focus point was not stable / remaining enough when moving the frame for recomposing.

 

If I understand you right you want to increase the size of the focus area, i.e. to make the nose and the eye in focus. Imagine a nudy branch diagonal in the frame from top right to bottom left with its head towards the lens. In this example a larger focus area by a group mode would be contradictory since the 4 group mode focus points might randomly select the eye or the nose of the nudi (probably where contrast is higher) and the one or the other might not be in the same focus plane (depending on DoF). Here you want to focus on the eye and be happy when nose is still in focus too. Alternatively instead of focusing on the eye you could use the good old 1/3 rule, namely get the focus point on the first third of the image (1/3 of total distance from close to far) and hope that both nose and eye are in focus.

 

The user manual says that group mode is more for situations when camera is not able to focus in other modes in order to avoid accidentally choosing the background instead of the subject as such.

 

But best way is to try the different mode when shooting underwater and make your own experiences...

 

regards


In Topic: Group Cluster Focus Points - Macro on Nikno

11 December 2018 - 06:13 AM

Hi,

if you want the nose and the eye of a subject in focus simultaneously and especially if the subject is diagonal in the frame, it is probably more a question of DoF and less of the focusing method you are using. Your D850 with a larger sensor as the 7200 with a cropped one gets you less DoF. 

 

I am shooting a D850 as well and normally I am using single servo /single focus point but moving around the focus field with the left/right/up/down arrows. You could use a smaller aperture for larger DoF e.g. f/16...22 (on diffraction's expense though) and keep primarily the eye of the subject in focus.

 

Other than that I didn't understand what you are trying to achieve, the attachment is missing.


In Topic: Z330 flash duration

30 November 2018 - 01:45 AM

interesting.

But better express the numbers in terms of 1/xxx sec, which is easier to read for photographers.

That is

 

full power = 1/300 sec

...

-6 = 1/10'000 sec.

 

But thanks anyways.

juerg


In Topic: Best wide angle lens for Nikon D850 in Nauticam housing

16 March 2018 - 09:17 AM

I am going to try the 14-24 f/2.8 on a Subal ND850 with a 65mm EXR and a 9" dome later.


In Topic: Does anybody make a properly working TTL trigger for Canon?

07 March 2018 - 10:05 AM

there are 2 dedicated new modules from Subal for Canons, but honestly i don't know whether they are any better since I am a Nikon shooter...

check it out here:

http://www.subal.com...lectronics.aspx