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06-05-2011, 12:12 AM   #1
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70-210mm F4 + canon adapter

Dear colleagues,

This is my first post here so let me introduce myself. I am 44 years old and am shooting for ~20 years, mostly with Canon.

I recently received the aforementioned lens from a friend who haven't used it in years. I think it is this one but it has no built-in hood so I'm confused. Are there two models? I can't also spot it in the picture. Serial number is 584xxxx and this is higher than any in the lens DB. Could it be related?

I want to try it out so I think about buying this adapter. Is this the right one?

I am also a bit of a lens hood fanatic. However, as I'm not sure if I'd like it or not (and thus, if I'll keep it or not) so I want to buy a cheap one. Which should I buy? I prefer plastic over rubber but a search got me nowhere.

BTW, there's a funny thing about zoom creep in my lens. It happens only if you are not in the 70mm position. At 70mm there seems to be more friction so it says there.

TIA.

Happy shooting,
Yakim.

06-05-2011, 01:21 AM   #2
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Yes, that adapter should do the trick. The lens has a built-in hood, so you should be fine with just using that.

Adam
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06-05-2011, 02:57 AM   #3
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Hi Yakim,
If the lens has a filter on it it may be preventing the hood from extending?
(just a thought) also, if you get the adapter with the AF confirmation chip it will show focus confirmation when in focus, that's the kind I got. The adapter I have would still cause most lenses aperture lever to hit the mirror box on my 50D so it wouldn't stop down past about f8 I think. I don't think most do this, and I don't remember which one I got. Remember not to use with a 5d or 1d or 1ds series as the mirror will hit the aperture lever. I did remove the lever on an old 50mm f1.4 for use on my 1D mkiii.
06-05-2011, 06:20 AM   #4
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QuoteOriginally posted by Adam Quote
Yes, that adapter should do the trick.
10X

QuoteOriginally posted by Adam Quote
The lens has a built-in hood, so you should be fine with just using that.
Just looked again and found it. Never thought of looking beneath the zoom/focus ring. Nice design.

06-05-2011, 06:31 AM   #5
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QuoteOriginally posted by borno Quote
Hi Yakim,
If the lens has a filter on it it may be preventing the hood from extending?
No filter. Just found it.

QuoteOriginally posted by borno Quote
(just a thought) also, if you get the adapter with the AF confirmation chip it will show focus confirmation when in focus, that's the kind I got. The adapter I have would still cause most lenses aperture lever to hit the mirror box on my 50D so it wouldn't stop down past about f8 I think. I don't think most do this, and I don't remember which one I got. Remember not to use with a 5d or 1d or 1ds series as the mirror will hit the aperture lever. I did remove the lever on an old 50mm f1.4 for use on my 1D mkiii.
I am reluctant to buy such an adapter as it is very expensive and as I said, I'm not sure I'll keep it. In fact, it's highly plausible that I'll sell it (I really like AF). But before I do, I'm curious to see how it'll perform.

Can you add pictures to explain the lever issue? I'm afraid I didn't understand. You see, I am very new at Pentax. I also shoot wide open, especially with slow lenses. If it matters, I'm shooting with 7D.

OT: Where is the automatic signature? I looked but was unable to fine it.

Happy shooting,
Yakim.
06-05-2011, 05:42 PM   #6
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Hi Yakim,
The adapter with the AF chip won't auto focus it just makes contact with the contacts on your camera to fool it into thinking you have an EF lens set to manual focus so the indicator in your viewfinder lights up when in focus. The exif on mine says a 50mm f2 lens is installed no matter what lens I put on it. Hope this helps.
06-05-2011, 11:01 PM   #7
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Tom, I know that. If I was sure I'd keep the lens I'd surely invest in a chipped one but as things look right now, I probably won't. I'm just interested to see how it performs.

BTW, I ordered the adapter. Now's the time to bite my nails....

Last edited by Yakim; 06-05-2011 at 11:11 PM.
06-06-2011, 12:20 AM   #8
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I've heard pentax aperture lever will hit canon's mirror, but don't know that only apply to canon FF or crop aswell, so you might want to look that up. In the worse case u need to saw off a bit of the lever to make room =P

06-06-2011, 02:14 AM   #9
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Well, according to what Tom said above f/4 should be safe.
06-25-2011, 05:40 AM   #10
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Well, the adapter finally arrived and I took a few tests shots. What can I say? I'm deeply impressed. Have a look here.

Happy shooting,
Yakim.
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