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02-07-2008, 01:43 PM   #1
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Old lens compatibility

I have some old lenses. They are not Pentax lenses, but they work with my Program A, and my ist dl. However, they don't seem to operate with my new k10d. I just get F-- flashing in the viewfinder. Is this the end of some of my non-pentax brand lenses?

02-07-2008, 01:56 PM   #2
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any information on brand/mount?
02-07-2008, 01:56 PM   #3
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QuoteOriginally posted by jay legere Quote
I have some old lenses. They are not Pentax lenses, but they work with my Program A, and my ist dl. However, they don't seem to operate with my new k10d. I just get F-- flashing in the viewfinder. Is this the end of some of my non-pentax brand lenses?
do they have the letter "A" on the aperture ring?

if yes, you have to put it in "A" when you attach it to the camera.

if they lack that, then its a fully manual lens, then you have to go into the camera menu system and disable the lock for non "A" lenses, then shoot in "M" mode only.
02-07-2008, 01:57 PM   #4
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Does not sound right. You should be able to use them, I think. Did you allow the usage of old lenses using the menu selections? (Don't remember the specific menu item).

02-07-2008, 02:08 PM   #5
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QuoteOriginally posted by Gooshin Quote
do they have the letter "A" on the aperture ring?

if yes, you have to put it in "A" when you attach it to the camera.

if they lack that, then its a fully manual lens, then you have to go into the camera menu system and disable the lock for non "A" lenses, then shoot in "M" mode only.

Do I have to lock it again in order to use my regular lenses, or can I leave it one I have disabled the lock?
02-07-2008, 02:10 PM   #6
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QuoteOriginally posted by jay legere Quote
Do I have to lock it again in order to use my regular lenses, or can I leave it one I have disabled the lock?
no you dont have to lock it

i dont know why they put that option there in the first place
02-07-2008, 02:12 PM   #7
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my K100D has it like this:

menu --> custom settings --> "using aperture ring" ---> 1. prohibited 2.permited

"pictures can be taken even when aperture ring position is other than A"

again, i have no idea why they would even bother with such a choice.
02-07-2008, 10:05 PM   #8
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problem solved

Thanks guys for all the help.

I see that there are some limitations with the old lenses, but they are sweet to play with.

My favourite oldie is a Ricoh 50mm 2.0 Feels so nice to manipulate the focus ring!

02-07-2008, 10:30 PM   #9
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I just opened my new K10D tonight and put my 28-80 lense off of my MZ7 Pentax, and had the same thing, the F-- flashing , and I could not figure out why until I realized the aperture ring had to be set on A, as mentioned by Gooshin. I didnt get far enough into the manual to find out about the lock for non "A" lenses. Anyway, once I switched the ring to "A" all was fine.

What is that lock all about anyway?
02-07-2008, 10:38 PM   #10
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When it is locked on "A" the camera can control the aperture, either automatically, or with one of the eDials. But if you want to use the aperture ring you have to set "using aperture ring" to permitted in the custom menu. And you can just leave it set that way, no need to change it back.
02-07-2008, 10:38 PM   #11
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QuoteOriginally posted by Gooshin Quote
do they have the letter "A" on the aperture ring?

if yes, you have to put it in "A" when you attach it to the camera.

if they lack that, then its a fully manual lens, then you have to go into the camera menu system and disable the lock for non "A" lenses, then shoot in "M" mode only.
Very well said
02-07-2008, 10:53 PM   #12
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QuoteOriginally posted by jay legere Quote
Thanks guys for all the help.

I see that there are some limitations with the old lenses, but they are sweet to play with.

My favourite oldie is a Ricoh 50mm 2.0 Feels so nice to manipulate the focus ring!
Jay, there are "some" limitations with the old lenses but keep in mind, there are limitless wonderful possibilities.

Just ask anyone in this forum and they will provide their limitless experience.

If you do not know how and do not ask how then you will not learn how.

Welcome to the "University of Pentax" which includes the best professors of Pentax on this planet earth and of this universe.

Please do not visit Venus. The Pentax professors are vain and arrogant there. The holdouts on Mars are coming around though.
02-08-2008, 12:22 AM   #13
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Just a warning that if you use the lens on with the camera on anything other than Manual the F-stop will always be held wide open by the aperture leaver.
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