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10-09-2013, 10:44 AM   #46
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QuoteOriginally posted by jake14mw Quote
So, there is a half stop difference between 1/180 and 1/250, and we also just lost a fifth? of a stop by no longer having ISO 80, I'm bad at math, what does that add up to?
seven tenths

10-09-2013, 10:56 AM   #47
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QuoteOriginally posted by jake14mw Quote
I thought there was a good debate about it here -
https://www.pentaxforums.com/forums/pentax-dslr-discussion/198977-why-higher-...ss-pentax.html

So, there is a half stop difference between 1/180 and 1/250, and we also just lost a fifth? of a stop by no longer having ISO 80, I'm bad at math, what does that add up to?
Iso 80 is 1/3 stop different from iso 100 (logarithmic scale -- iso 25, 50, 100, 200, etc).
10-09-2013, 11:28 AM   #48
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QuoteOriginally posted by Rondec Quote
I understand what you are saying. I just don't know how much of a difference you really get in real life situations between a sync speed of 1/180 second and 1/250 second. I would love to see these sorts of situations demonstrated, because to me it is a relatively small difference. It reminds of me of the way Pentax users (me included) gloat over the fact that the sensor in the K5 got two points on the sensor score at DXO mark over the sensor in the D7000, when I am sure you can't really tell the difference in real life shooting.

I don't do much flash either, but i did do a portrait outdoors for the Director of a live theater non-profit last summer. It was a classic portrait with her illuminated by flash, and a shakespeare stage, illuminated by ambient, behind her. Worked out fine and she liked 3 of the versions I submitted. My impression was that modern digital processing software eliminates SOME of the need to get it right with flashes. Once the flash had established some contrast between ambient and flash, it was easy to deepen that shadow or lighten it with a few sliders in LIghtroom. So the sync speed had no practical impact on this shoot at all.

So i sympathize with the frequent flash shooters out there, but the K3 was quite a upgrade in all other areas. Hopefully, the next iteration will deal with the whole flash system in its entirety.
10-09-2013, 03:20 PM   #49
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QuoteOriginally posted by Rondec Quote
I just don't know how much of a difference you really get in real life situations between a sync speed of 1/180 second and 1/250 second
In real life, hand holding a 300mm lens(450mm equiv) with a shutter speed of 1/180th is harder than it is at 1/250th.

10-09-2013, 03:38 PM   #50
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QuoteOriginally posted by Digitalis Quote
In real life, hand holding a 300mm lens(450mm equiv) with a shutter speed of 1/180th is harder than it is at 1/250th.
Good heavens! I can't imagine even dreaming of using a 300mm lens with fill-in flash, let alone do it in real life. My needs are much more modest.
10-09-2013, 04:03 PM   #51
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QuoteOriginally posted by Cynog Ap Brychan Quote
Good heavens! I can't imagine even dreaming of using a 300mm lens with fill-in flash, let alone do it in real life.
Well, I do that on a regular basis:

Pentax K10D - Sigma 100-300mm f/4 APO EX DG @ 220mm (330mm equiv) @ 1/180th - Wireless AF540 FGZ+ Honl 1/2 CTO gel.

Last edited by Digitalis; 10-09-2013 at 10:37 PM.
10-09-2013, 09:34 PM   #52
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A most excellent shot - well beyond my meagre capabilities!
10-09-2013, 09:51 PM - 1 Like   #53
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QuoteOriginally posted by philbaum Quote
So i sympathize with the frequent flash shooters out there, but the K3 was quite a upgrade in all other areas. Hopefully, the next iteration will deal with the whole flash system in its entirety.
Actually, that was part of the rumors too - a new flash "system" or an overhaul of the P-TTL and other stuff Pentax has been lagging in the flash department. But yeah, one development at a time. The K-3 already delivered more than one. I can wait further (Metz 58-AF2 still doing what I need it to do anyway, lol!)

QuoteOriginally posted by Digitalis Quote
Pentax K10D - Sigma 100-300mm f/4 APO EX DG @ 220mm (330mm equiv) a 1/180th - Wireless AF540 FGZ+ Honl 1/2 CTO gel.
How do you do that without surprising the bird? The last time i did that with my 55-300 and set the flash on wireless, the bird flew halfway in the exposure.

10-09-2013, 10:22 PM - 1 Like   #54
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Shucks

Didn't Pentax just introduce a new shutter in the K3 designed for 200K actuations and redesigned dampening mechanisms etc?They could have easily done the 1/250 flash sync, but that's just my opinion

RobA_Oz;2535231: The answer probably lies in the price point that was set for the K-3. If it is the case that the higher sync speed would require a redesigned shutter, we'd likely have been paying more for the new camera.
10-09-2013, 10:35 PM - 1 Like   #55
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QuoteOriginally posted by solar1 Quote
Didn't Pentax just introduce a new shutter in the K3 designed for 200K actuations and redesigned dampening mechanisms etc?They could have easily done the 1/250 flash sync
yes, they did - however the dampeners are designed to reduce mirror shock, and vibrations caused by the aperture mechanism not shutter vibrations.

QuoteOriginally posted by Alizarine Quote
How do you do that without surprising the bird?
Move quietly and confidently, make no sudden unexpected movements. Though I do have to admit that I have an innate talent for working with animals - which gives me a bit of an edge over other wildlife photographers.


Last edited by Digitalis; 10-09-2013 at 10:42 PM.
10-10-2013, 01:43 AM   #56
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QuoteOriginally posted by Digitalis Quote
yes, they did - however the dampeners are designed to reduce mirror shock, and vibrations caused by the aperture mechanism not shutter vibrations.



Move quietly and confidently, make no sudden unexpected movements. Though I do have to admit that I have an innate talent for working with animals - which gives me a bit of an edge over other wildlife photographers.
Nice shot of the laughing kookaburra!!
10-10-2013, 03:17 AM   #57
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Great shots there Digitalis. I'll try moving like how you said, but I guess that means getting off the coffee...
10-12-2013, 08:53 AM   #58
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QuoteOriginally posted by solar1 Quote
Didn't Pentax just introduce a new shutter in the K3 designed for 200K actuations
Maybe it came down to - do we give them a shutter with 1/2 stop faster flash sync AND sounds like a machine gun, or retain the 1/180 sync AND the K-5 shutter sound?
10-12-2013, 09:02 AM   #59
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QuoteOriginally posted by Digitalis Quote
yes, they did - however the dampeners are designed to reduce mirror shock, and vibrations caused by the aperture mechanism not shutter vibrations.



Move quietly and confidently, make no sudden unexpected movements. Though I do have to admit that I have an innate talent for working with animals - which gives me a bit of an edge over other wildlife photographers.
So, you're saying there's no hope for the rest of us. We just have to bow to your innate abilities and repeat..'we are not worthy"? Darn, I was hoping you had emulatable tricks.
10-12-2013, 09:13 AM   #60
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QuoteOriginally posted by solar1 Quote
Didn't Pentax just introduce a new shutter in the K3 designed for 200K actuations and redesigned dampening mechanisms etc?They could have easily done the 1/250 flash sync, but that's just my opinion

RobA_Oz;2535231: The answer probably lies in the price point that was set for the K-3. If it is the case that the higher sync speed would require a redesigned shutter, we'd likely have been paying more for the new camera.
Maybe they have. The new construction is rather complex, could it be they are not yet finished with the firmware in that area, but the shutter might have those capabilities when everything is fine tuned in FW? I am not sure I believe my own argument as historically at least the sync speed has only been a mechanical thing...but maybe not any longer?
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