Depth of field

JohnTF said:
Part of being on your game, just as having focus zone set, knowing which way to turn the lens, choosing focal length, angle of view, -- all tools.

A bit of simplicity in isolation-- I do not care for many "busy" backgrounds with bright areas to draw the eye somewhere distracting to the image you want.

Some days it just seems you see all of this with the right subjects, and then there are the others, and the circle of confusion includes everything.

Often a disappointment when you cannot get position, or your equipment lets you down.

Regards, John
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There are times when I don't want to bother with relationships other than to the light, so I go to isolation and minimalism and my viewers ask, "where is the rest of the picture?" :bang:
Bob
 
Okay- just as this is settling down... Apples and Oranges. Stopping down for increased DOF means smaller aperture and slower shutter speed. This introduces camera shake. Most photographers shoot without tripods or other means to minimize the effects of vibration on a photo. Camera vibration at slow shutter speeds is likely to increase blur. This will defeat the use of a small aperture to increase the resolution of the objects in a photograph. All objects will appear equally blurry, so the DOF increases.

So- DOF is defined as the range that objects appear equally sharp, i.e. at the same level of focus. To increase the DOF of your image, shake the camera while you snap the picture.
 
Bob Ross said:
There are times when I don't want to bother with relationships other than to the light, so I go to isolation and minimalism and my viewers ask, "where is the rest of the picture?" :bang:
Bob
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Perhaps that says more about the viewer than the photographer.

Regards, John
 
JohnTF said:
Perhaps telling you which could be rebuilt and which were replaced?

Ford had a nasty habit of using ones much too small, 1/4" and with our winters, and salt, would break off-- bled one cylinder with a .004" feeler in the top of the cup, lasted longer than the car. The really right tools were then purchased for the next go around. Noticed the MG had 3/8" plated screws on a much smaller car.

Don't think many places rebuild much these days.

I know you like terms, perhaps you have not been told a Ford Wrench is a large hammer.

J
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Dear John,

Another name for a hammer is a Birmingham screwdriver.

I have to confess that I don't rebuild slave cylinders either. New Girling ones are only £10-15. I can't see why anyone buys cheap Turkish or Chinese ones just to save another fiver. Same with master cyinders: £22 vs. £15 or so. Hell, my LIFE depends on those things...

Cheers,

R.
 
Roger Hicks said:
Dear John,

Another name for a hammer is a Birmingham screwdriver.

I have to confess that I don't rebuild slave cylinders either. New Girling ones are only £10-15. I can't see why anyone buys cheap Turkish or Chinese ones just to save another fiver. Same with master cyinders: £22 vs. £15 or so. Hell, my LIFE depends on those things...

Cheers,

R.
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My dad, an engineer and "standards-man" often used the term percussive-screwdriver for a 2.5 lb copper faced hammer, or gas-spanner for an Oxyacetylene torch

If only Girling knew of the magical properties of Copper-Slip when applied to brake adjusters and bleed-nipples the would would be much less stressful

edit;
Another, when asked how tight something should be tightened was "until it snaps ... then back it off a quarter"
 
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ampguy said:
Freytag's '69 book "The Hasselblad Way" recommended .06mm coc for standard work, and .03mm for "critical work"

Leica's DOF lens markings are based on .023mm making them perfectly suitable for APS-C, APS-H, and legacy medium sizes.
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More like 0.033 actually, similar to most other 35mm lens markings.
 
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