Why is shortest possible shutter speed 30s? |
Page <123> |
Author | |||
neilt3 ![]() Senior Member ![]() Joined: 13 September 2010 Country: United Kingdom Location: Manchester.U.K Status: Offline Posts: 2879 |
![]() ![]() ![]() ![]() |
||
I'm not aware of anything made in the last forty or so years having a "T" setting . I think that's only an option with mechanical shutters , not electronically controlled ones . So not on autofocus film or digital cameras . |
|||
![]() |
|||
Bob J ![]() Admin Group ![]() Dyxum Administrator Joined: 23 December 2005 Country: United Kingdom Location: London Status: Offline Posts: 27015 |
![]() ![]() ![]() ![]() |
||
I seem to remember that part of the reason for not having really long exposure options on an electronic shutter were that on some cameras that had up to 2 minutes on auto you could find yourself having to wait a long time between shots when loading a film (when typically the lens cap might be on).
I think later cameras tended to unlink the meter for those first loading shots, while others metered off the film (so if the exposure was long you could just point the camera towards light). Reciprocity failure would also have been a reason for losing the slower speeds though. |
|||
RBJ ~ Moderation on Dyxum
|
|||
![]() |
|||
Snegren ![]() Senior Member ![]() Joined: 11 November 2011 Country: Netherlands Location: Zuid Holland Status: Offline Posts: 5651 |
![]() ![]() ![]() ![]() |
||
The only shutters I have seen that can be toggled are from 1930s folding cameras (very practical when you want to use such lenses on digital). |
|||
“People demand freedom of speech as a compensation for the freedom of thought which they seldom use.” Søren Kierkegaard
My Flickr |
|||
![]() |
|||
Hobgoblin ![]() Senior Member ![]() Joined: 25 November 2006 Location: United Kingdom Status: Offline Posts: 1508 |
![]() ![]() ![]() ![]() |
||
Its not really redundant though. A cable release is extremely useful in lots of circumstances and its not exactly bulky or heavy. |
|||
![]() |
|||
XKAES ![]() Senior Member ![]() Joined: 24 September 2021 Country: United States Location: Colorado Status: Offline Posts: 154 |
![]() ![]() ![]() ![]() |
||
Just because you're not aware of cameras -- such as the Seagull DF-1000A -- doesn't mean they don't exist. The Seagull DF-1000A is a 35mm SLR having an electronic, focal-plane shutter with speeds from 1/1,000 to 1 second PLUS B AND T settings. And, yes, it was made in this century! So digital cameras could put a T setting on their cameras if they chose to. |
|||
http://www.subclub.org
http://www.subclub.org/minman http://www.subclub.org/minchin |
|||
![]() |
|||
addy landzaat ![]() Senior Member ![]() Joined: 22 April 2006 Country: Netherlands Location: Netherlands Status: Offline Posts: 12887 |
![]() ![]() ![]() ![]() |
||
My Fuji GW690, a.k.a. Texas Leica, also has a T-setting. The mark III version was introduced in 1992, that is within 40 year. Much more interesting camera then the Seagull
![]() There is no reason to assume a T-setting couldn't be done with an electronic shutter. But I can understand why most camera makers did not implement it as when the battery runs out with the shutter open it might be a problem. And, people complain to no end about the T-mode - there is that. |
|||
Why not follow me on Instagram? @Addy_101
|
|||
![]() |
|||
Miranda F ![]() Senior Member ![]() Joined: 11 January 2014 Country: United Kingdom Location: Bristol Status: Offline Posts: 4019 |
![]() ![]() ![]() ![]() |
||
One or two of the Zeiss folding cameras I used had one. Nowadays you're lucky to get a 'B'. |
|||
Miranda F & Sensorex, Sony A7Rii, A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras ...
|
|||
![]() |
|||
XKAES ![]() Senior Member ![]() Joined: 24 September 2021 Country: United States Location: Colorado Status: Offline Posts: 154 |
![]() ![]() ![]() ![]() |
||
A T shutter setting is no more of a problem for a dead battery than the B setting is.
|
|||
http://www.subclub.org
http://www.subclub.org/minman http://www.subclub.org/minchin |
|||
![]() |
|||
Miranda F ![]() Senior Member ![]() Joined: 11 January 2014 Country: United Kingdom Location: Bristol Status: Offline Posts: 4019 |
![]() ![]() ![]() ![]() |
||
Yes, I do remember the time when cameras didn't have batteries. ![]() |
|||
Miranda F & Sensorex, Sony A7Rii, A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras ...
|
|||
![]() |
|||
Michael Johansson ![]() Senior Member ![]() Joined: 13 May 2006 Country: Sweden Location: Gullaskruv Status: Offline Posts: 714 |
![]() ![]() ![]() ![]() |
||
This thread is named "Why is shortest possible shutter speed 30s?". Shouldn´t it be ...longest...?
|
|||
a7RII ~ V5.6/10mm ~ V4.5/15mm ~ S1.8/20mm ~ S4/24-105mm ~ V1.4/35mm ~ CZ1.8/55mm ~ V2/65mm ~ S2.8/90mmMacro ~ S1.8/135mm ~ 5600HS(D) ~ HVL43AM ~ Ring+Macro TwinFlash
|
|||
![]() |
|||
Tricky01 ![]() Senior Member ![]() Joined: 08 September 2010 Country: United Kingdom Location: Woodley, Berks. Status: Offline Posts: 3165 |
![]() ![]() ![]() ![]() |
||
I know there will be some times when a cable release is still useful (albeit probably already present in Sony's Imaging Edge app) but not sure it's justification for keeping the max shutter speed limited to 30s. Maybe Addy hits the nail on the head here, though surely the same challenge is present with bulb on a cable release:
![]() |
|||
Site
A7iii, A7Riii, A7R (full spectrum) 12f2.8, 15f2, 16-35f4, 35f1.8, 50 1.8, 85f1.8, 135GM, 100-400GM, 200-600G, 1.4xTC // A mount: Sig90f2.8, Sig180f3.5 Macros |
|||
![]() |
|||
addy landzaat ![]() Senior Member ![]() Joined: 22 April 2006 Country: Netherlands Location: Netherlands Status: Offline Posts: 12887 |
![]() ![]() ![]() ![]() |
||
Let me explain. If the normal position of the shutter is closed, the shutter needs to be kept open by force, draining the battery. That is a problem. You might say the battery also drains with the B position, however, if you no longer push the button, the shutter automatically closes - with T no such situation - you can put it in the bag with the shutter open. One can of course design a shutter that can be set open and closed, I can imagine some design limitations to that. You need to force close the shutter and I doubt it was possible to do this quickly enough for fast shutter times. These are things I can think about, maybe there are more difficulties. Also, by then, the standard was B not T - so, why take the risk and just keep the market standard and only offer B. |
|||
Why not follow me on Instagram? @Addy_101
|
|||
![]() |
|||
XKAES ![]() Senior Member ![]() Joined: 24 September 2021 Country: United States Location: Colorado Status: Offline Posts: 154 |
![]() ![]() ![]() ![]() |
||
With an electronic shutter if you use B and the battery dies while the shutter is still being help open (with a finger or a cable release) is no difference than with T when the shutter is opened with a press of the button (or cable release).
The shutter is open and the battery dies (which would only happen with long exposures, of course). It makes no difference to the camera if T or B is being used -- the shutter is open and the battery dies. Releasing your finger in B mode makes no difference. |
|||
http://www.subclub.org
http://www.subclub.org/minman http://www.subclub.org/minchin |
|||
![]() |
|||
addy landzaat ![]() Senior Member ![]() Joined: 22 April 2006 Country: Netherlands Location: Netherlands Status: Offline Posts: 12887 |
![]() ![]() ![]() ![]() |
||
![]() |
|||
Why not follow me on Instagram? @Addy_101
|
|||
![]() |
![]() |
Page <123> |
Forum Jump | Forum Permissions ![]() You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |
This page was generated in 0.063 seconds.

Dyxum.com - Home of the alpha system photographer
In memory of Cameron Hill - brettania
Feel free to contact us if needed.