I have bought this same Sigma AF 28-200mm last summer as I didn't want to drag/hassle
with heavy camera equipments on my travel to China + don't have enough money for proper Pentax zoomlenses.

I was fully aware of it's limits, especially the dark circle in the corners (not sure what's it called in English) if using
Wide mm. If you don't mind that it's quite a good lens for that price I think.

Yes, I'd bought the same but from another eBay seller. (It's a 'key'? I called this a 'metal device')

I haven't removed the springy metal* but had pushed it down and screw the adapter from the lens.


*at first I thought you meant the little blue metal piece on the side of the adapter itself, that's why I'd asked that stupid question #2...

Oh I see...it's not the inconvenience as such I was worried about, it's more that I'm afraid I will damage some things and never be able to use it again. (little 'accidents' with machines in the past)

As a real Pentax fan I'm looking for an older K mount camera like ME/LX or even K1000 so I can use this adapter without my worries. (But I was already searching for an older K camera before this adapter thing)

Again, thank you Mr. Riley!

And this worries me a little, would it be very easy to remove it or do I have to follow the same 'ballpoint' procedure to remove the adapter off the body?

(I only have 2 -not so fast- zoom lenses for the MZ-s and 2 fast screw lenses for the SP1000 and I need both camera's for different usages>>can't take the risk to have to miss a lens or body due an adapter)

Thanks for the help! I'm so relieved I had maneged to get this adapter off my f/2 lens (yes I meant f/2 I must have mixed things up as it was 3am CET )

I've noticed there was an other miniscule metal thing on the lens itself, other than the blue metal springy strip on the side of the adapter and tried to push that down and for a while the adapter was totally struck (-a little panick-) but I used a metal device that helps you screw the adapter off and it came off, luckily.

I haven't tried it again on my MZ-s yet, but does it matter whether you screw the ring first on the lens or on the body itself?

Hello, I'm newbie Lee and I have the same problem as Slacker:
I'd bought a K Mount to M42 lens adapter and I can't unscrew the adapter ring from the lens now.

Seller (eBay) told me I had to have strong hands (unless there was a safety lock on my lens) but I'm afraid I will damage the lens if I use brute force.

Question 1: Does an original Takumar 50mm/1.2 lens have this 'safety lock'?


Question 2: (this may sounds stupid of me...) Do you mean you HAD to remove the whole bit of springy metal otherwise the adapter will stuck there forever?

Question 3: Can I use such a 'K Mount to M42' adapter ring on my Pentax MZ-s? ('cos it doesn't fit the body, unless I'm doing something wrong?)




I hope someone can help me out with this as I do want use that 50mm screw lens on my Pentax SP1000 next month.

Thanks,

Lee