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Focus settings (1 Viewer)
- Thread starter Roger P
- Start date
Feathered one
Well-known member
CRF
The conclusion is, as we all know, higher aperture, equals larger depth of field.
But how this works through a scope I wasn't sure, not being an expert in optics. So with a simple length of wood and some card, I was able to prove for myself.
With the Nikon ED82 scope with 30x wide eyepiece and a Fuji F30 camera, located 20 metres from the target.
1 The Macro setting makes no difference
2 With full zoom on the camera there is hardly any difference in DOF using an aperture of f4.5 or f8.0
3 With no zoom on the camera and aperture of f4.5 there is good focus still about 1.5 feet (45cm) at the front and back of the target.
4 With no zoom on the camera and aperture of f8.0 there is good focus still about 2.25 feet (69cm) at the front and back of the target.
3 As mentioned on this or another thread, focusing the scope, then pressing the shutter release half way, and holding it while fine tuning the scope, before taking the picture, seems to acheive sharpest pictures for me.
The observations detailed, may not be true with other scope/camera/ eyepiece combinations.
Malc
The conclusion is, as we all know, higher aperture, equals larger depth of field.
But how this works through a scope I wasn't sure, not being an expert in optics. So with a simple length of wood and some card, I was able to prove for myself.
With the Nikon ED82 scope with 30x wide eyepiece and a Fuji F30 camera, located 20 metres from the target.
1 The Macro setting makes no difference
2 With full zoom on the camera there is hardly any difference in DOF using an aperture of f4.5 or f8.0
3 With no zoom on the camera and aperture of f4.5 there is good focus still about 1.5 feet (45cm) at the front and back of the target.
4 With no zoom on the camera and aperture of f8.0 there is good focus still about 2.25 feet (69cm) at the front and back of the target.
3 As mentioned on this or another thread, focusing the scope, then pressing the shutter release half way, and holding it while fine tuning the scope, before taking the picture, seems to acheive sharpest pictures for me.
The observations detailed, may not be true with other scope/camera/ eyepiece combinations.
Malc
Last edited:
Feathered one
Well-known member
Neil said:
Yes I agree Neil.
I guess some of the problem is in the rush to get everything set up and focused before the bird moves off.
I am really looking forward to some better weather, to be able to get out more, with better light, and less wind.
In the 8 weeks I have had the scope and camera, I have only been out with it 6 times. But I can already see the capability of the equipment, to take some decent shots.
Malc
john-henry
Well-known member
Feathered one said:
A very worthwhile test Malc, this is the sort of thing we all learn from. What distance were you from your target?
Regards
John
Feathered one
Well-known member
john-henry said:
Twenty metres John, pretty well the length of the front garden, any further and either the target or myself would be out on the road :-O
The wife :gh: thinks I am mad, cutting up bits of cardboard with numbers on, and screwing them to bits of wood, :brains:
Malc
Feathered one
Well-known member
erniehatt said:
Thanks Ernie
I am just one of those, that has to find out how things work.
I can sit and read a technical manual, but not a novel.
The last year at school (some 42ish years ago) I was allowed to skip history, to do a second practical subject instead.......... SAD :-O
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