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02-15-2016, 06:33 PM   #166
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QuoteOriginally posted by StephenHampshire Quote
I too photograph trains, going at merely 25 mph. With a long run past, it is easy to rack up 24 shots (current RAW buffer for K3) in short burst of 5 or 6 frames. 4fps is less of an issue than 17 shot buffer I had hoped for an increase in processing power to accommodate the larger number of pixels per image. Plus ensuring a decent shot with "rods down*" is not that easy, even at 8fps!!

*only applicable to steam locos!
So, you were "pacing" {driving parallel to the train} when you took this picture?

{BTW - thank you for an image to enjoy in the middle of this sometimes dry discussion}

02-15-2016, 06:41 PM   #167
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QuoteOriginally posted by LFLee Quote
How's that 0.7x in FF compare to current K series (area wise)?
Film cameras still kick the crap out of digital SLR viewfinders.

But I see what Pentax is up to now, and my have they been clever.

---------- Post added 2016-02-16 at 12:13 PM ----------

QuoteOriginally posted by Wired Quote
So I can trick it into hss using son duration strobe
and end up with this:


Pentax K5IIs - Sigma 180mm f/3.5 APO EX - ISO 80 f/11 flash sync at 1/500th - the shadow is being cast by the second shutter curtain.
02-15-2016, 06:59 PM - 2 Likes   #168
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Here's my best example of a fast burst:

02-15-2016, 07:54 PM   #169
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QuoteOriginally posted by Kunzite Quote
That's an improvement from K-3's 560 frames; using the same battery.
The fps is decreased, but there's more data to be processed per frame.
Those number are weird. I've gotten over 800 shots on the K-3 with one battery (and without running it empty). No flash, daytime, jpgs. No problems or complains with the K-3 battery life, and don't see why the K-1 would be any different (well actually it should have much better battery life).

02-15-2016, 07:55 PM   #170
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QuoteOriginally posted by rlatjsrud Quote
Duh, that's not even convenient for long exposure.
Okay.
02-15-2016, 08:06 PM   #171
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QuoteOriginally posted by reh321 Quote
What do you photograph that changes more than four times per second?? I sometimes photograph trains going 50 mph, and I find that my K-30 set at the lower burst rate (3 fps) is more than enough to get the picture I want (assuming I remember to set it to burst at all).
The shot below was taken at the K3's highest frame rate. Focus and exposure preset to capture the male or female bluebird in flight as they brought food to youngsters in a nest box Observed them for a while so I knew approximately where to frame, but I kept the camera back to include much more area than required to capture the bird (image below cropped to less 1/3 or so of the original). Even at 1/3200 second the wings are blurred, and even at the highest frame rate the bird would be wholly recorded in flight in no more than two frames of the burst. The image below was posted in 2014 in a different thread, Apologies to anyone who's already seen it.
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02-15-2016, 08:14 PM   #172
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QuoteOriginally posted by rlatjsrud Quote
Duh, that's not even convenient for long exposure.
Agreed. My GR is limited to 30sec. In all modes but M. In M mode it allows for a slow speed of 300 seconds followed by B (bulb) and T (time). Maybe the M setting on the K1 will have a similar implementation. Exposures longer than 30sec without having to touch the camera would be nice.

---------- Post added 02-15-2016 at 10:18 PM ----------

QuoteOriginally posted by jatrax Quote
Why not? You use a remote that costs maybe $20, set the delay, the time of exposure and push the button. What am I missing?
Possibly the fact that there are much more elegant and intuitive solutions. See the GR implementation as an example. I'm curious; how do Canon and Nikon handle this?
02-15-2016, 08:21 PM   #173
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QuoteOriginally posted by jatrax Quote
Why not? You use a remote that costs maybe $20, set the delay, the time of exposure and push the button. What am I missing?
Max long expose is 30sec. You can't expose longer than 30 sec.

02-15-2016, 08:24 PM - 2 Likes   #174
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QuoteOriginally posted by rlatjsrud Quote
You can't expose longer than 30 sec
yes you can, in Bulb mode. The time you can leave the shutter open is pretty much limited by the battery life of the camera.


Pentax K5IIs - SMCP-FA31mm f/1.8 ASPH Limited ISO80 f/11 1m30s + Lee Big stopper ND filter used.

Last edited by Digitalis; 02-15-2016 at 08:33 PM.
02-15-2016, 08:26 PM   #175
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QuoteOriginally posted by CRPhoto Quote
Those number are weird. I've gotten over 800 shots on the K-3 with one battery (and without running it empty). No flash, daytime, jpgs.
CIPA standard measuring for battery life includes lots of in-built flash usage, if fitted. If you shoot your K-3 outside of test conditions (eg no flash, minimal rear LCD usage, no video usage, RAW only, SR turned off, no usage of SDM etc) your shot count will increase.

Since the K-1 has no flash, that fact by itself may help bump up the baseline battery life/image count stats relative to K-3.
02-15-2016, 08:27 PM   #176
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You also get longer than 30 seconds using Astrotracer.
02-15-2016, 08:32 PM   #177
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QuoteOriginally posted by jatrax Quote
Why not? You use a remote that costs maybe $20, set the delay, the time of exposure and push the button. What am I missing?
That people don't want to have to carry around yet another accessory in the dark?

I have a hard time imagining that a programmable bulb mode would be very complicated when, as you say, a $20 remote can do it. But it would be very appreciated by those who'd use it.
02-15-2016, 08:38 PM   #178
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QuoteOriginally posted by Digitalis Quote
yes you can, in Bulb mode. The time you can leave the shutter open is pretty much limited by the battery life of the camera.


Pentax K5IIs - SMCP-FA31mm f/1.8 ASPH Limited ISO80 f/11 1m30s + Lee Big stopper ND filter used.
Does it even have a scale more than 30 sec? Bulb mode? No. I want the exact exposure and I don't rely on guessing exposure at all.
02-15-2016, 08:45 PM   #179
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QuoteOriginally posted by rlatjsrud Quote
I want the exact exposure and I don't rely on guessing exposure at all.
You can mentally calculate the exposure*, or of that is too mentally taxing for you to manage: use a handheld exposure meter.


QuoteOriginally posted by indy Quote
how do Canon and Nikon handle this?
the same way as Pentax does. With Bulb mode.

QuoteOriginally posted by VoiceOfReason Quote
you also get longer than 30 seconds using Astrotracer.
The problem with that is the sensor is moving when you use the astro tracker.


* if your metered exposure is 1s at f/8 ISO 100, then how much longer would the shutter have to be open if you put a ND10 filter on your lens?

Last edited by Digitalis; 02-15-2016 at 09:39 PM.
02-15-2016, 09:25 PM - 2 Likes   #180
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Pentax could add 45, 60, 90, 120, 180 second shutter speeds to M mode. The hardware can already keep the shutter open that long so it's probably a simple firmware change.
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