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Author Topic: Learning to use a Long Lens  (Read 196 times)

rabanito

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Learning to use a Long Lens
« on: September 14, 2020, 01:31:22 pm »

Hi
I'm testing a 600mm tele.
In this case, I put the camera on a tripod and relesed with cable
I was trying low ISO (125) and testing focusing
1/100sec at f/6.3

One of the pictures  shows the whole frame just as a reference.

I took three pictures.
File 1 focusing Single Point. I use BBAF. Locked the focus and let it go before taking the picture.
File 2 was taken locking up the mirror
File 3 was taken using Live View (mirror up) and zooming the image. I understand that this methode is more accurate but didn't expect to notice anything in this case.

The focus point was on the mast on the left.

Now the pic taken using the viewfinder(File 1) is less sharp than the other two
I corrected this(VF Photo) using the program Sharpen AI in the mode "stabilize" and attached it for comparison. Looks much better. (File 4)

My question is.
Could it be that this unsharpness is due to the movement of the mirror plus long focal length plus long shutter time? Looks like it.
I have very little experience w/ long lenses.
The other 4 files are on my next msg.
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rabanito

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Re: Learning to use a Long Lens (II)
« Reply #1 on: September 14, 2020, 01:33:02 pm »

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