Forum: General Talk
03-15-2012, 12:37 AM
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Aufstehen? :D
Wo kommt ihr eigentlich her? Ich bin aus Berlin.
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Forum: Pentax K-5 & K-5 II
03-14-2012, 10:04 PM
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LOL.
I've now sold my camera and purged all pictures taken. They must have been trash.
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Forum: General Talk
03-14-2012, 10:00 PM
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Forum: Pentax K-5 & K-5 II
03-01-2012, 03:04 AM
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I don't regard this problem as specific to me, as friends of mine photograph in a similar way. I also don't think that Canon, Nikon etc. (and thus the majority of the DSLR market) are wrong about their understanding of a 2 s timer. Remember: for mirror lockup, you have an extra option and I'd guess that the hooks in star trails you wrote about are caused by the mirror, not the shutter - see the links I posted above.
Nevertheless we've exchanged our points, more would simply be disputing. So I'll live with this limitation in usage and hope Pentax will be more on my side with evaluating this issue. ;)
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Forum: Pentax K-5 & K-5 II
03-01-2012, 02:33 AM
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Googling around I've found shutter blur with the K-7 for exposures of fractions of a second: Falk Lumo: LumoLabs: Shutter-induced blur with an SLR camera
But the K-5 does not suffer from this any more: https://www.pentaxforums.com/forums/pentax-k-5-forum/127267-k-5-shutter-blur.html
Additionally, how would a delay help against vibrations from a starting shutter? How would - *if* it existed with the K-5 - it be relevant with exposures of, say, 8 s +/- 2 EV?
Canon, Sigma, Fuji (all owned) and if I remember right, also Nikon (friends).
No, the remote is not the problem. As said, I actually own 2, so I could program one with a 2 min. exposure and use the other for simple shutter press. But I had to always switch them which I don't like. (I prefer to keep one remote connected to reduce wear on the pins).
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Forum: Pentax K-5 & K-5 II
03-01-2012, 01:30 AM
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I hope at least we agree that mirror lockup is intended to reduce shake induced by mirror. So, please - as you've left my points unanswered - why should there be a delay *between* bracketed shots initiated with only 1 shutter press when no mirror movement occurs between the shots?
Additionally, for mirror lockup the K-5 has an extra option, so I guess the manual is a bit unclear about the 2 s timer. Time *timer* is not intended for mirror lockup (the extra option is) but it has mirror lockup *additionally* as it makes sense to use the delay *also* for reducing mirror shake. I bet the 12 s timer will also include mirror lockup (don't have the K-5 right here now).
So, concluded: not various other camera makers are implementing the 2 s timer wrong - but Pentax does.
I'm asking whether you've read my post thoroughly. ;)
I own 2 wireless remotes already and already explained why this doesn't help either.
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Forum: Pentax K-5 & K-5 II
03-01-2012, 12:41 AM
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We're cycling rounds here. I've never contradicted that mirror lockup reduces sensor shake. But please note that
1st: the manual talks about reducing shake from shutter button which will not happen between bracketed shots,
2nd: at least in live view mode the mirror does not come down between shots and so does not create mirror shake and
3rd: even without LV mode the mirror does not have to come down between shots as the K-5 does not charge the shutter with the mirror.
Regarding macros: I've already taken some (up to 7:1; though not with the K-5) and never needed a 2 s delay *between* the bracketed shots.
Even beside we might dispute about whether I called for mirror lockup (which is available in an extra option) or a simple 2 s delay it is a firmware fault anyway: because between the shots no mirror movement occurs. Already the K-7 did not need the mirror come down to charge the shutter.
So *some* other camera manufacturers are making buggy firmware? :)
I can assure you that at least I never got a sharpness difference between bracketed shots even though the 2 s delay took place only once.
But probably I should make clear why this 2s delay between the shots resembles a problem to me: I'm mostly shooting at night which regularly requires bracketed exposures. Even under full moon and with fast lenses I sometimes need short shutter times if I either want to catch clouds sharp or avoid hard edges between panorama frames (clouds, shadows with low moon). In the past with other camera makes this was not a problem. Now with the K-5 of course I will use a remote to achieve the usual self-timer behaviour. But this makes unneccessary extra work as I have a programmed remote which is set to 2 min. (for shots where time is not an issue). To use this remote for a simple "one shutter press" I have to always switch the operating mode on the remote and reprogram the time again. Using two remotes (which I actually own) is not an option as I'd have to switch them on camera.
You might regard this type of photography a special use but there are some people around me photographing similar things / in a similar style and especially for this type of photography bracketing and a 2 s delay are of most use.
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Forum: Pentax K-5 & K-5 II
02-29-2012, 05:25 PM
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I think we don't reject the test due to fanboyism. I cannot speak for others, but at least for me I regard the test not only as faulty, but actually as highly misleading. Reasons see above. I myself don't regard the K5 ISO capabilities as stellar as others do and am confident the K-5 applies noise reduction even to RAW files (which I highly dislike) at least from ISO 1600 - but what Jim wrote is simply BS.
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Forum: Pentax K-5 & K-5 II
02-29-2012, 03:36 PM
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I expected this answer and the manual states the same regarding the 2 / 12 s timer. BUT: We're not talking about the timer only, but about timer *with bracketing* here. And considering this the manual states:
"mirror pops up immediately after the shutter release button is pressed" and "this mode to avoid camera shake when the shutter release button is pressed". If I configure the camera to take all bracketed images with ONE shutter press there should - by definition from the manual - be only *one* 2 s countdown.
This type of astro photographer most probably will also not need bracketing, as he stacks images with the same exposures. So if we were talking about 2 s delay in between multiple (non-bracketed) exposures I'd probably agree.
Yeah, that's true and might be a solution for the thread opener as well as the suggestion with the remote. But I think there are also many photographers who take bracketed exposures *and* need the 2 s delay. Many people around me are taking night shots which require longer exposures and thus tripod usage. To avoid shake, they use the 2 s timer and to capture the high contrasts they use bracketing. They often have problems with light trails from cars etc. (at least if not intended) and a 2 s delay between the exposures worsens the problem. The same applies for night time landscape photography including stars.
To my understanding we have not found a single reason why there should be a 2 s delay between bracketed exposures yet but found various situations where this behaviour resembles a problem or at least requires additional equipment (remote).
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Forum: Pentax K-5 & K-5 II
02-29-2012, 01:21 PM
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Of course we can presume that the 2 s delay between exposures is intentional and certainly the chance for this is higher than for a flaw. That's why my opinion is only a guess. But if we're honest we also have not found any reason for this behaviour yet which actually rises the chance (not the necessity) for a flaw.
Regarding astrophotography: Well, I've not done this - yet. Nevertheless I take long exposures with at least "intermediate" 200 mm and thus know for causes of sensor shake and their influence at least at that beforementioned focal length. My experience is: a heavy wooden tripod, a geared head, mirror lockup and the self-timer are sufficient to at least 1000 mm (FF equiv.). And, as I stated before: You cannot avoid the micro vibrations of the accelerating shutter. The vibrations of a decelerating shutter before are much less in amplitude (and with opposite direction). Even if you think about avoiding resonance (e.g. if the shutter runs forth & back and does not need to be charged) a short break of some milli seconds would be quite enough. And finally the main argument has not been answered to: if the 2 s delay between the shots is intentional, why does it not happen when using the 12 s self-timer°? Actually, when using longer lenses at least the people without a wireless remote would probably choose that 12 s instead of the 2.
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Forum: Pentax K-5 & K-5 II
02-29-2012, 04:37 AM
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+1, in all terms.
There's no need to think "at least he let down to answer". Of course he answers when he knows he's caught. The only question is: caught for what.
A wannabe's writing? Advertisers puppet? Or just pure lack of knowledge about proper testing? Let's see.
He claims to compare sensors here.
What he actually compares: At which level an arbitrary trigger was kept. A trigger which is not differentiated between chroma and b/w noise (at least not in the review; don't know, if imatest separates those values). A trigger from an image in a lossy compression format. Created by an unknown JPEG engine. Feed by a noise suppression algorithm. Which is configurable, as he even admits himself.
I *never* regard people this much naive, so I tend to assume full intention on his side.
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Forum: Pentax K-5 & K-5 II
02-29-2012, 03:01 AM
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If it ain't working, don't fix it - ignore it! Yeah.. that's the spirit. :D
Let's get serious again. *Every* image "suffers" from the vibrations of the shutter accelerating. As we all know, this is not really an issue. So how much could the deceleration of the shutter of an image - which even happens *before* the shutter acceleration for the current image - have influence? None, right.
So I thought if a reason for the 2 second delay betweeen the exposures might be some Nikonian style of loading the shutter through mirror mechanics? But the K5 does not have this type of shutter and as Zen4Life already pointed out the 12 s timer takes the bracketed exposures directly after another.
So I personally would guess for (another) firmware flaw.
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