Supervised by
Takayuki Yoshida

D810A Shooting Guide

Focusing

01

Find the focus peak during live view by enlarging images up to approx.
23x for precise focus confirmation.

When shooting star fields and nebulae, rotate the focus ring of the lens or telescope so that the brightest star nearest to the center of the frame (e.g. a fixed star of the second magnitude) looks smallest and brightest. With the D810A, images can be enlarged up to approx. 23x during live view, allowing you to easily confirm precise focus on the camera's monitor without using a loupe or a PC monitor.

How to focus

1

Frame bright stars of the second magnitude in the viewfinder.

2

Press (live view) button to activate the live view mode.

3

Viewing the image of the stars on the monitor, adjust the focus.
If the stars are not clearly visible enough, heighten ISO sensitivity.

4

Target the brightest star on the screen with (focus point) by pressing on the multi selector.

5

Magnification of the zoom display around the focus point increases (up to approx. 23x.) with each press of the button.
Press (Playback zoom out/Thumbnails) button to zoom out.
While the image is zoomed in, use on the multi selector to scroll to other areas in the frame.
Activating exposure preview
In some cases, activating exposure preview by pressing button will enhance the visibility of the live view screen. Refer to "D810A Astrophotography Tips 2."
D810A Astrophotography Tips 2
Magnification to 200% with a single press
When the initial zoom magnification during live view is set to [High magnification (200%)] on "f2" in the Custom Settings menu, maximum zoom can be instantly toggled on and off by pushing the center of the multi selector.

6

Viewing the image on the monitor, fix the focus ring to a position where the star appears smallest and brightest.
Marking the focus position on the focus ring or draw tube using a pen or pencil will greatly assist when readjusting the focus.
Temperature change affects focus position
If you take your equipment from a warm room to a cold outside situation, for example, the precise focus position may change due to temperature fluctuation, even if you fixed it immediately after going outdoors. It is therefore important to confirm precise focus before and during shooting, just in case.
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