Shutter speed testers (Page 2): And youve been here how long ?!?!?

User ID

Longshadow wrote:

Curious - Knowing that the shutter is precisely on does what?
For 1/1000 is 1025, or 1050, or 950... not acceptable?
Why?
What difference would it make in an exposure?

Same with the exposure meter.
Just know how that camera behaves for the result one desires.

And youve been here how long ?!?!?

User ID

a6k wrote:

I had two Hondas which both read about 4 or 5 mph high at highway speeds. My GMC Acadia and my Wrangler both read correctly. How do I know? Well I used to use a stopwatch on the highway where there were mile posts but now I just use my iPhone for which there are various apps.

Why bother? Because I want to be able to go as fast as is legal and not worry about a ticket. Duh!

I use satelite tracking.

Longshadow Loc: Audubon, PA, United States

User ID wrote:

And you've been here how long ?!?!?

Long enough to know that people worry about different things.....
MANY different things.

User ID

Clearly this all has a 1:1 relationship to the eclipse occurring in April.

BebuLamar

Longshadow wrote:

I never thought about that.
Not going to think (or worry) about it either.

Some cameras have a large shot to shot variation. That is why although I don't worry about rolling shutter problem I really want to get rid of the mechanical shutter as it's a very inaccurate device.

Longshadow Loc: Audubon, PA, United States

BebuLamar wrote:

Some cameras have a large shot to shot variation. That is why although I don't worry about rolling shutter problem I really want to get rid of the mechanical shutter as it's a very inaccurate device.

Whatever trips your breaker.

BebuLamar

Longshadow wrote:

Whatever trips your breaker.

You know it's a device where 30% off is acceptable and 10% off is considered excellent.

Longshadow Loc: Audubon, PA, United States

BebuLamar wrote:

You know it's a device where 30% off is acceptable and 10% off is considered excellent.

I never thought about it in 50+ years of shooting.

User ID

BebuLamar wrote:

Some cameras have a large shot to shot variation. That is why although I don't worry about rolling shutter problem I really want to get rid of the mechanical shutter as it's a very inaccurate device.

Given that the OP uses a Kowa Six, all this is truly pissing into the wind. Leaf shutter SLRs were always a really sketchy design concept.

How recently was the shutter relubed and its mainspring replaced ? And how many lenses are on hand ?

Anywho, the OP is brand new here at UHH, and already fits right in perfectly. Therefor, addressed to the OP: "Welcome home !"

BebuLamar

User ID wrote:

Given that the OP uses a Kowa Six, all this is truly pissing into the wind. Leaf shutter SLRs were always a really sketchy design concept.

How recently was the shutter relubed and its mainspring replaced ? And how many lenses are on hand ?

Anywho, the OP is brand new here at UHH, and already fits right in perfectly. Therefor, addressed to the OP: "Welcome home !"

Yeah I have not medium format camera but I have a couple of the Yashica Lynx 14 which I like very much but their shutter speeds are way off. One of them has shutter speed almost 2 stops slow. I can still use them because I know which speeds I actually get.

a6k Loc: Detroit & Sanibel

Longshadow wrote:

Our one car is 2 MPH high, I don't worry about it or go 2 MPH faster.
I don't need to go as fast as I can, I'll still get there.
But for some it really is about saving TWO minutes......

When I drive 6+ hours a day for four days in a row I want to know my speed accurately. There are speed traps, for example. It isn't about saving two minutes.

When I fly my airplane I want accurate airspeed and groundspeed and fuel consumption. Maybe you can guess why. If you don't care about it, that's fine. But other folks may have valid points of view, too.

scoundrel Loc: Wytheville VA

BebuLamar wrote:

In fact all 3 cameras are considered to have excellent shutter speed accuracy.
Take the Nikon F3 specification for the 1/1000 shutter speed. The aim point is 1/1024 (not 1/1000) but the acceptable range are from 1/709 to 1/1470.

These numbers, 1/709 and 1/1470 sec, are each 0.53 stops off the ideal 1/1024 second. I would have expected limiting numbers closer to exactly 1/2 or 1/3 stops off. Not that it makes that much difference in actual practice, but I am now curious where these numbers came from.

If you happen to have a leaf shutter, the f-stop at which the measurement is made will make a difference in the measured shutter speed because the shutter leaves can clear a small aperture opening faster than a large one, making the effective exposure time effectively longer at the small aperture. This may make a slight but noticeable difference at faster shutter speeds. The proportion of the time at which the shutter is only partly open would also be a greater portion of the exposure. I have never heard anyone claim that this affected the depth of field at high shutter speeds and wide apertures, but it would be theoretically possible.

scoundrel Loc: Wytheville VA

Longshadow wrote:

Curious - Knowing that the shutter is precisely on does what?
For 1/1000 is 1025, or 1050, or 950... not acceptable?
Why?
What difference would it make in an exposure?

Same with the exposure meter.
Just know how that camera behaves for the result one desires.

A 5 percent change in exposure time amounts to a negligible 0.07 (or about 1/14) of an f-stop. My raw image processor from Canon can change effective exposure in 1/6 stop increments, which is good enough for my purposes.

Longshadow Loc: Audubon, PA, United States

scoundrel wrote:

A 5 percent change in exposure time amounts to a negligible 0.07 (or about 1/14) of an f-stop. My raw image processor from Canon can change effective exposure in 1/6 stop increments, which is good enough for my purposes.

BebuLamar

scoundrel wrote:

These numbers, 1/709 and 1/1470 sec, are each 0.53... (show quote)

The number came from the Nikon F3 service manual. The 0.53 is due to the round off. The number is given as 1.41 millisecond and 0.68 millisecond. I think they meant 0.5 stop. Slower speeds have tighter tollerance.