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02-14-2011, 04:04 AM   #1
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Flash for Pentax ist k110d

I have just bought my first dslr, a Pentax ist k110d and still waiting for it to arrive. I already own 2 flashes and was wanting to know if either or both will work with the camera. I have a Pentax AF280T dedicated flash and a Cobra D650 also Pentax dedicated. I hope someone can help. Thanks

02-14-2011, 06:20 AM   #2
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You can do a search

If I recall correctly from reading on these forums the AF280T works (yep, see e.g. PENTAX AF 280T - Pentax Accessory Review Database - Flashes, Grips, Camera Bags ).

For any 'old' flash it's advisable to check the trigger voltage; according to this page the Cobra is safe to use. A voltage that is too high will fry your camera.

I can not say which functionalities will still work; they both are probably no longer dedicated flashes and only work in auto mode (flash determines correct exposure instead of camera) or manual mode.

Congratulations on the purchase and enjoy it; sure you can't wait for it to arrive.

Last edited by sterretje; 02-14-2011 at 06:46 AM.
02-14-2011, 06:22 AM   #3
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First of all, there is no "ist K110D" it is either an *istD series camera or a K110D

This makes a big difference in flashes.

The makority of *istD series cameras (*istD, DS DS2 at least) work with both P-TTL flash, and TTL flash. The AF280T will work with these cameras.

The K110D supports only P-TTL Flash, and therefore the AF280 will not work with this camera unless it also has a built in sensor to support Auto mode.

The simple answer for any K series DSLR and Old flashes is that unless it (the flash) supports Auto mode it will not work in any mode other than manual.
02-14-2011, 07:28 AM   #4
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If you use that AF280T on that camera, K110D, you can't use it in TTL mode, but that flash actually works very well in either the green or red auto mode. I've got 2 of those flashes, and I used them on my K7 in auto mode.

02-14-2011, 03:44 PM   #5
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"Dedicated" refers to being able to communicate with a specific brand of camera, which the AF280T is still capable of doing even though there is no TTL functionality on the camera body he will be using. It will still communicate when in Auto mode and is still a "dedicated" flash.

The flash does have two levels of auto output and will work just fine with the K110D in auto. I wish Pentax would start making it again, maybe with a little higher guide number.
02-14-2011, 09:22 PM   #6
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Mike, can you explain what will be communicated in that case?
02-14-2011, 10:56 PM   #7
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Just wanted to say thanks for the link t the accessories database, I didn't realise it was there despite loads of time perusing the lens one lol.
02-14-2011, 11:34 PM   #8
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QuoteOriginally posted by sterretje Quote
Mike, can you explain what will be communicated in that case?
Certainly. The selected flash output level is communicated so the camera can make aperture settings automatically, based on ISO. Of course, this assumes the use of a lens capable of having the aperture controlled by the body.....basically everything except M and M42 lenses.

02-15-2011, 09:15 AM   #9
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Thanks Mike.

There was obviously a reason for asking, but I needed to verify my facts first. In auto mode one has to set 2 parameters (ISO and aperture) for the flash to be able to determine correct exposure. So I can imagine that those could still be still communicated and I do not see that happen when the flash (AF540 in this case) is in auto mode. Hence the assumption that the flash is no longer a dedicated flash and the question
02-15-2011, 10:35 AM   #10
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You don't set ISO on the AF280T; the slider isn't actually connected to anything.
03-28-2011, 04:17 AM   #11
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Thanks for all your help and yes sorry it is a K110d not a pentax ist like I mistakenly put. But its arrived and seems to work fine with both flashes but but I still use the built in 1 the most yet, I just tried the other 2 to see if they did. I did check the voltage of both first though so thanks again for your help.
03-28-2011, 04:25 AM   #12
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QuoteOriginally posted by Mike Cash Quote
I wish Pentax would start making it again, maybe with a little higher guide number.
Isn't that one the AF400T? (not currently made either)
03-28-2011, 04:26 AM   #13
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I'm now selling a few of my Pentax film cameras since getting the K110d but keeping most of my older lenses, well the best ones anyway like the smc Pentax-a 1.7 and a couple of the Tamron SP zooms I have. But Am pleased with the K11od so far, till I save enough to upgrade to something like a K7 or a K-x I will decide when the time comes btu am leaning towards the K7 so far
03-28-2011, 04:29 AM   #14
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no Calicojack it was the AF280T I first asked about and a Cobra D650 , asking if they were ok with a Pentax K110d. They answered me and I've since tried them and both work with it to a limit.
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