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01-05-2013, 07:23 PM   #1
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No bulb w/o leaf shutter?

So is it true that you can't do bulb mode without a leaf shutter? This would make third-party K mount adapters borderline useless for macros!


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01-05-2013, 09:24 PM   #2
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It's true. Just checked it.
01-06-2013, 12:15 AM   #3
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QuoteOriginally posted by Adam Quote
So is it true that you can't do bulb mode without a leaf shutter? This would make third-party K mount adapters borderline useless for macros!
Hi Adam,

No news here -- it's stated in the manual that without a leaf shutter lens, long exposures are limited to 2 sec with no Bulb Mode. I imagine with multi exposure mode, you could stretch this to 18 sec, but I haven't tried it.

What kind of macros would you use Bulb Mode for? I can't think of any, but II usually only shoot plants, flowers, bugs and such. I'd think that if something was stationary enough to use such long exposures, I'd have time to add some light to the subject.

3rd party adapters are very limiting for macros, but for a different reason -- the 1/13 sec flash sync and the Q's not quite standard protocols for flash. The sync speed has been addressed by the OEM K to Q adapter. The second has been improved by FW v1.10, but I wouldn't go so far as to call it a fix.

Scott
01-06-2013, 12:20 AM   #4
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QuoteOriginally posted by snostorm Quote
Hi Adam,

No news here -- it's stated in the manual that without a leaf shutter lens, long exposures are limited to 2 sec with no Bulb Mode. I imagine with multi exposure mode, you could stretch this to 18 sec, but I haven't tried it.

What kind of macros would you use Bulb Mode for? I can't think of any, but II usually only shoot plants, flowers, bugs and such. I'd think that if something was stationary enough to use such long exposures, I'd have time to add some light to the subject.

3rd party adapters are very limiting for macros, but for a different reason -- the 1/13 sec flash sync and the Q's not quite standard protocols for flash. The sync speed has been addressed by the OEM K to Q adapter. The second has been improved by FW v1.10, but I wouldn't go so far as to call it a fix.

Scott
I happened to be shooting some test shots using the Kiwi adapter (the Pentax one is already boxed up and ready to go back to B&H). I ended up bringing in an additional light and that did the trick. Without the extra light, 18 seconds were required for this particular exposure at minimum ISO.

I think that this alone is a compelling reason for users to get the Pentax adapter over third-party junk!


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01-06-2013, 10:11 AM   #5
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QuoteOriginally posted by Adam Quote
I think that this alone is a compelling reason for users to get the Pentax adapter over third-party junk!
Not in all cases. I shoot macro photography at work for small electronic parts. I use a copy stand with 4 flood lamps mounted on it. I rarely need a shutter speed of more than 1/2 second. I haven't tried the Q yet for these shots (I just got it 2 weeks ago and I've been on vacation), but I'm sure it'll be fine.

It's the flash issue that may compel me to get the Pentax branded adapter sooner or later.
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