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Low light performance in crop sensor body
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Dec 8, 2018 18:59:27   #
TriX Loc: Raleigh, NC
 
Chris T wrote:
No, it isn't hard to take control of two of those variables, but it is MORE complicated to attempt to balance THREE ...

As you pointed out - when dealing with film - ISO is already established, by the speed of the film ... the one exception, of course, is the HP4/5 films produced by Ilford - which had a base ISO of 400, but were also capable of as high as 650 - if set that way on the camera. With regard to pushing - in the processing stage - there were two ways to do it - either increased agitation of the drum, or by using a slightly higher temperature. However, both of those are fraught with complications, if you strayed too far away from the recommended time, temperature, or agitation. The beauty of the Ilford films - was that you didn't have to resort to such measures. If you dialed in 650 on the camera - that's what you got on film.

It can be seen, though - apart from push-processing - we only deal with shutter and aperture. In the digital age, we must also factor in ISO - since that is not engraved on our media cards (don't you wish it was?) ... so - we must now balance all THREE variables, on every exposure. Now, then - apart from jugglers - who are quite used to balancing three or more items - the average layman - has only two hands. Thus, we can deal with ISO in one hand, and shutter speed in the other, or we can deal with shutter speed in one, and aperture in the other - and allow ISO to be the one dish floating in the air - above us - if you get my drift ... this is the method I prefer ... and I should think most other non-jugglers - also do prefer it ....
No, it isn't hard to take control of two of those ... (show quote)


Two or three - I just think of it in terms of stops (If you know the f-stop scale). Pick the highest (or fixed) priority, then balance the other two - simple compromise(s) - how much shutter speed to freeze the motion, how much DOF is needed, and how much noise are you willing to trade? Simple.

Btw, I “push” B&W such as Tri-X by changing the developing time, not the temperature or agitation - isn’t that what you do? I’ve routinely pushed it 2 stops (to 1600) and some have sucessfully pushed it as far as 5 (12,800), but you can certainly see the grain.

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Dec 8, 2018 18:59:31   #
A. T.
 
Chris T wrote:
A.T. - thanks for agreeing, first of all ...

In regards to the triangle - I feel only the user can decide whether max DOF is required, as opposed to shallow DOF - so max control of aperture is paramount. But, in regards to the other two elements - shutter speed, and ISO - both controlling only the amount of light allowed onto the media, beyond affixing parameters (slowest shutter speed accepted) and a clear ceiling on ISO - those elements are better left to camera electronics. In most cases - given the aforementioned caveats - most digital cameras - do surprisingly well ... particularly - selection of Auto ISO ....

Try it!!! ... You might like it!!! ... Mikey does!!!!
A.T. - thanks for agreeing, first of all ... br b... (show quote)


You are correct once again. I meant in those low light situations where you usually have a choice to use a tripod with a slower shutter speed if your subject is stationary or a higher ISO to bump up your shutter speed if you need to handhold your camera.

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Dec 8, 2018 19:06:52   #
A. T.
 
TriX wrote:
I feel that even more important is shutter speed (a shot with incorrect DOF may or may not be useful, but a blurry shot due to inadequate shutter speed is useless) and also can only be decided by the user. I agree in letting the camera control the ISO in a changing light situation, so I’m typically shooting manual shutter speed and aperture with auto ISO except when shooting ETTL flash (auto ISO and ETTL can cause some strange settings) in which case I shoot full manual. One advantage of a body that manages high ISO noise well is that you just don’t need to worry about the ISO except in extreme situations.
I feel that even more important is shutter speed (... (show quote)



Absolutely, that's my point as well. When there is ample light, there's no problem. It's in those "golden hour" situations that can cause ISO issues.

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Dec 8, 2018 19:33:05   #
Chris T Loc: from England across the pond to New England
 
TriX wrote:
Two or three - I just think of it in terms of stops (If you know the f-stop scale). Pick the highest (or fixed) priority, then balance the other two - simple compromise(s) - how much shutter speed to freeze the motion, how much DOF is needed, and how much noise are you willing to trade? Simple.

Btw, I “push” B&W such as Tri-X by changing the developing time, not the temperature or agitation - isn’t that what you do? I’ve routinely pushed it 2 stops (to 1600) and some have sucessfully pushed it as far as 5 (12,800), but you can certainly see the grain.
Two or three - I just think of it in terms of stop... (show quote)


That's the problem, you see, TriX? ... Push processing gains grain. Yes, of course, I've used longer development times, as well as increased agitation, and higher temps - all three of which will gain one or two stops - depending on the increase in each venue. Ideally, of course - one should stick to the temp, time, and agitation procedure provided by the film manufacturer - unless, of course - you switch from D76 to Microdol - which also allows some increase in film speed, at the development stage. And there are other developers in that sphere, too - which also provide some increases.

The "aperture scale" has changed now in the digital age. In the film era (I know - some are still in it) we were dealing with f1.2, f1.4, f1.8, f2, f2.4, f2.8, f3.5, f4, f5.6, f8, f11, f16, f22, f32, f45, f64, f128, f256 ... of course, Minolta came out with f1.7 ... and one or two other makers also had some other in-between f-stops, if I remember, rightly. But, all that's changed now, in the digital age. We now have things like f5, f6, f7, f9, f10, f12, f13, f15, f18, f20, f24, f28, and so on. Because of the way modern digital cameras are designed - aperture scales are now like sliding rulers - they do not need to double to get to the next stop - if the other assigned parameters dictate in an in-between aperture - that's what you get. Not so difficult ....

And THIS is one of the reasons I prefer SP mode, and Auto ISO, and let the camera figure out the other parameter ... f17??? ... oh, okay!!!

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Dec 8, 2018 19:42:23   #
Chris T Loc: from England across the pond to New England
 
A. T. wrote:
Absolutely, that's my point as well. When there is ample light, there's no problem. It's in those "golden hour" situations that can cause ISO issues.


Early Dawn - does not seem to be much of a problem for most modern dig cams. But, you're right - dusk - can be a pain-in-the-neck!!!!

Some of my shots taken at both times - have an eerie - mystical quality to them ... but I much prefer the ones when there was enough light coming through to create that feeling. The early evening shots - have sometimes worked ... but many of them shot at that time - have only survived - as I saw something magical - in moonlight reflected ... but, for the most part - those shots have been delegated to the waste-basket ...

It's all a learning experience - digital photography, A.T. ... after many moons of practice and experimentation - one can eventually feel when one is shooting at the right moment in time - the "Golden Hours" - as you put it ... but some of them are Silver ... and are no less magnificent!!!!

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Dec 8, 2018 19:43:51   #
Chris T Loc: from England across the pond to New England
 
A. T. wrote:
You are correct once again. I meant in those low light situations where you usually have a choice to use a tripod with a slower shutter speed if your subject is stationary or a higher ISO to bump up your shutter speed if you need to handhold your camera.



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Dec 8, 2018 19:47:04   #
A. T.
 
Chris T wrote:
Early Dawn - does not seem to be much of a problem for most modern dig cams. But, you're right - dusk - can be a pain-in-the-neck!!!!

Some of my shots taken at both times - have an eerie - mystical quality to them ... but I much prefer the ones when there was enough light coming through to create that feeling. The early evening shots - have sometimes worked ... but many of them shot at that time - have only survived - as I saw something magical - in moonlight reflected ... but, for the most part - those shots have been delegated to the waste-basket ...

It's all a learning experience - digital photography, A.T. ... after many moons of practice and experimentation - one can eventually feel when one is shooting at the right moment in time - the "Golden Hours" - as you put it ... but some of them are Silver ... and are no less magnificent!!!!
Early Dawn - does not seem to be much of a problem... (show quote)


LOL, I do understand.

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Dec 8, 2018 19:49:44   #
Strodav Loc: Houston, Tx
 
Bison Bud wrote:
While I understand the importance of a fast lens, the use of a tripod, and that we've discussed many times the advantages of a "Full Frame" sensor when it comes to overall low light performance, I am pretty much stuck in a crop sensor world for my photography hobby. This is primarily because of the price differences, but it is also due to the overall, physical size of the FF, DSLR's that I have had the pleasure to handle personally, with say the Canon 6D being about as big as I would ever care to go. While neither of my DLSR's are noted for their low light performance, I do okay with my Pentax K3 and/or my backup Canon T1i. However, low light performance has always been a big disappointment for me with either camera. While the K3 has a much higher ISO range than the T1i, it also appears to bring in more noise at comparable ISO settings and frankly, neither is really acceptable to me above say ISO 1600. I guess going higher with the ISO is better than not getting a shot, but even after extensive efforts in post processing, the noise levels are bothersome to me and I have to wonder if there isn't a crop sensor DLSR or Mirrorless body out there that could be a real improvement in overall low light performance without having to move up to a FF sensor.

Therefore, I am interested in discussion on which crop sensor body might have the best overall low light performance (not just how high I can set the ISO, but more about the results when I do use a high setting). I'd also be interested in what I should be looking for as I research this area of performance in today's offerings, as well as any other less equipment related tips you might be willing to share. Before you ask, I am on a fixed income and my photography budget is a lot lower than I like it to be. Therefore my personal, yet optomistic, budget would have to be under $1000.00 and I would prefer to find something used and save every dollar I possibly can. I'd be very willing to do without things like GPS and WiFi as long as there is real improvement in the low light performance. Thanks and good shooting to all.
While I understand the importance of a fast lens, ... (show quote)


DxOMark is my go to site for camera sensor comparisons https://www.dxomark.com/cameras/launched-between-2002-and-2018/launch_price-from-0-to-45200-usd/sensor_format-sensor_apsc#hideAdvancedOptions=false&viewMode=list&yDataType=rankDxo I searched on APS-C size sensors, but you can search the database for anything you want. The top 3 for low light performance are the Nikon D7500, Sony A6300, and the Nikon D5500 (look at the Sports column).

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Dec 8, 2018 19:54:42   #
rehess Loc: South Bend, Indiana, USA
 
Strodav wrote:
DxOMark is my go to site for camera sensor comparisons https://www.dxomark.com/cameras/launched-between-2002-and-2018/launch_price-from-0-to-45200-usd/sensor_format-sensor_apsc#hideAdvancedOptions=false&viewMode=list&yDataType=rankDxo I searched on APS-C size sensors, but you can search the database for anything you want. The top 3 for low light performance are the Nikon D7500, Sony A6300, and the Nikon D5500 (look at the Sports column).

That's OK if you understand what they are testing and that they don't test every camera.

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Dec 8, 2018 19:59:35   #
TriX Loc: Raleigh, NC
 
Chris T wrote:
That's the problem, you see, TriX? ... Push processing gains grain. Yes, of course, I've used longer development times, as well as increased agitation, and higher temps - all three of which will gain one or two stops - depending on the increase in each venue. Ideally, of course - one should stick to the temp, time, and agitation procedure provided by the film manufacturer - unless, of course - you switch from D76 to Microdol - which also allows some increase in film speed, at the development stage. And there are other developers in that sphere, too - which also provide some increases.

The "aperture scale" has changed now in the digital age. In the film era (I know - some are still in it) we were dealing with f1.2, f1.4, f1.8, f2, f2.4, f2.8, f3.5, f4, f5.6, f8, f11, f16, f22, f32, f45, f64, f128, f256 ... of course, Minolta came out with f1.7 ... and one or two other makers also had some other in-between f-stops, if I remember, rightly. But, all that's changed now, in the digital age. We now have things like f5, f6, f7, f9, f10, f12, f13, f15, f18, f20, f24, f28, and so on. Because of the way modern digital cameras are designed - aperture scales are now like sliding rulers - they do not need to double to get to the next stop - if the other assigned parameters dictate in an in-between aperture - that's what you get. Not so difficult ....

And THIS is one of the reasons I prefer SP mode, and Auto ISO, and let the camera figure out the other parameter ... f17??? ... oh, okay!!!
That's the problem, you see, TriX? ... Push proces... (show quote)


Microdol is gone, but we used to use it for its fine grain characteristics. When not using D-76 or HC-110 with Tri-X, I prefer Acufine when pushing.

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Dec 8, 2018 20:06:40   #
Chris T Loc: from England across the pond to New England
 
A. T. wrote:
LOL, I do understand.



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Dec 8, 2018 20:13:43   #
Chris T Loc: from England across the pond to New England
 
TriX wrote:
Microdol is gone, but we used to use it for its fine grain characteristics. When not using D-76 or HC-110 with Tri-X, I prefer Acufine when pushing.


Acufine was one of the "others" to which that thought was related ... but there are some others, too. (Acutol, Perceptol)

I didn't know Microdol-X was discontinued by Kodak, TriX ... I've been "in the dark" (or not!) - since I pursued Digital.

HC-110 was okay to use for sheet film (4x5, 5x7) but, I would never have dreamed of using it for 35mm or 120/220 film ...


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Dec 8, 2018 20:47:32   #
TriX Loc: Raleigh, NC
 
[quote=Chris T]...HC-110 was okay to use for sheet film (4x5, 5x7) but, I would never have dreamed of using it for 35mm or 120/220 film ... [quote/]

Started using HC-110 occasionally for 120 Tri-X LONG ago after reading “The Negative” by A.A. I still have a darkroom and typically use D-76, Acufine or Rodinal now with Tri-X 35 or 120.

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Dec 8, 2018 20:59:08   #
Chris T Loc: from England across the pond to New England
 
[quote=TriX]
Chris T wrote:
...HC-110 was okay to use for sheet film (4x5, 5x7) but, I would never have dreamed of using it for 35mm or 120/220 film ... [quote/]

Started using HC-110 occasionally for 120 Tri-X LONG ago after reading “The Negative” by A.A. I still have a darkroom and typically use D-76, Acufine or Rodinal now with Tri-X 35 or 120.


Me, too, TriX ... three enlargers - Beseler 4x5 Motorized, Beseler 21/4x31/4 with Dichroic Head, Vivitar 21/4x31/4 - which I just use for contact sheets.

I've tended to stay with D-76, because I know its properties so well, now ... after 50 years processing film. Although, I have experimented a little.

It's been a while, now, though - since I've spent any kind of major time, in there. There was a time in my life, when I lost track of day and night ...

Lightroom, et al - has opened up my Darkroom Door ... and now my eyes are more used to white light, than red, yellow and green lights ...


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Dec 8, 2018 21:12:20   #
User ID
 
TriX wrote:
.........
the net-net is that I just don’t see how the concept of
exposure (shutter speed vs aperture and maybe ISO)
is all that complicated. Maybe it’s because I grew up
with all manual cameras and film ISO was fixed (but
could be pushed), but it’s just not that hard to take
control of two of the exposure variables.


Right you are. Not complicated. When the home freezer
was first marketed, one of the trial balloons for what to
sell folks as frozen food was .... FROZEN WATER ! Just
thaw, and it's ready. NOT joking :-(

Initial advances in AE for camera users was pretty tame
and use of manual control was equally easy. Over time
the same bunch who thought up selling frozen water did
their best to sell complex solutions to simple problems,
such as how to expose a picture. We lately have users
asking questions about how to "steer" the automation to
produce pictures in various situations and scenes, and it
is clear that with AE having become insanely complex at
the user interface, that M-mode is quite unthinkable to
such users. "If Auto is so difficult, Manual must be nearly
impossible .... ".

Sadly, almost no one seems to perceive those situations
where it's just easier, simpler, and more direct, to just
DO a thing than to properly instruct a robotic aid in how
to do that thing.

The "Scene Selection" AE modes are insanity. When so-
called "Matrix Metering" arrived in the the late 1980's I
tested a simple 7-zone version, an all analog system, in
all the situations where ordinary AE would let you down
and expose for the wrong thing. I was AMAZED. It was
nearly impossible to fool the thing, and it didn't need to
be told what kind of scene it was looking at. A scene is
a scene is a scene. It's just a bunch of brightness zones.

Now we have users asking if the Indoor Hockey mode is
possibly good for Birds Against a Bright Sky. The Matrix
Metering just saw them both alike, cuz they ARE alike,
exposure-pattern-wise. So OK the Matrix didn't know if
it should prioritize shutter speed or DoF. The user had to
tend to that little task, which is no trickier than choosing
between Wedding and Penguins in the Scene AE mode.
But "DoF" and "Shutter Speed" are scary terms cuz they
are "Tech Talk" where as "Wedding" and "Penguin" are
just ordinary non-scary language.

Now I need we "Smart Home" AI system to automatically
re-order more Frozen Water when inventory runs low :-(

.

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