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09-17-2014, 09:08 AM   #1
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old lens for 645z

I have a chance possibly to get three lenses that were for the 645 film body, a f2.8 55mm, and a f2.8 75mm and a f3.5mm 150mm.

my question is are they any good to use with either a 645d or the newr 645z?

thanks

09-17-2014, 09:16 AM   #2
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Most old lenses are still up to standards optically. They also fill the numerous gaps in the DA lineup. Refer to the lens reviews for opinions on each individual lens

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09-17-2014, 09:37 AM   #3
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thanks Adam
09-17-2014, 11:42 AM   #4
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The A 75mm is as good as the FA, but feels more solid; the 150mm is very good as well (on film, no idea on D or Z) but different from its FA subling. Sharp, not so close focus, and just different. I sometimes regret selling it but as I already have the FA it was superflous.
The A 55mm is good but perhaps not at the same level, again, all on film. For the prices they go for, you might as well try what you like.

09-17-2014, 12:24 PM   #5
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They are all manual focus so ok for landscape and location/studio work I guess it all I would be using a 645 for anyway.

i might even try them with a adapter for using on a k5IIr
09-17-2014, 01:01 PM   #6
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I used the 75mm on the K-x and it was easier than the SMC Takumar 1.8/85mm (no compensation to factor in, unlike the Takumar), very good, not overly big, but perhaps a tad, tad less sharp. So much easier though that I would not hesitate.
The 120mm and 300mm were outstanding on the K-x.
But they are not small, so if you are going to lump things around you might as well take the 645 body.
09-17-2014, 01:56 PM   #7
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QuoteOriginally posted by adwb Quote
They are all manual focus so ok for landscape and location/studio work I guess it all I would be using a 645 for anyway.

i might even try them with a adapter for using on a k5IIr
With a 645 to K adapter, I have tried the A120 macro first on my K5IIs and now on my k3. The results are outstanding. I also have the FA 200 f4. It is autofocus but it works only in manual mode on the DSLRs. Both are perfect for close or medium range distances. I have had some sharpness issue on the infinity setting. It might be the adapter I am using or it is just not good on DSLRs for infinity work. I had to do some nature shots for an assignment and I was hoping the long lenses would be perfect on my K3 but they did not come through for me.

I have purchased them in advance of an eventual acquisition of the 645Z. I am looking to fill the gap on the wide end of the range as well.
09-18-2014, 05:03 AM   #8
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QuoteOriginally posted by btnapa Quote
With a 645 to K adapter, I have tried the A120 macro first on my K5IIs and now on my k3. The results are outstanding. I also have the FA 200 f4. It is autofocus but it works only in manual mode on the DSLRs. Both are perfect for close or medium range distances. I have had some sharpness issue on the infinity setting. It might be the adapter I am using or it is just not good on DSLRs for infinity work. I had to do some nature shots for an assignment and I was hoping the long lenses would be perfect on my K3 but they did not come through for me.

I have purchased them in advance of an eventual acquisition of the 645Z. I am looking to fill the gap on the wide end of the range as well.
Do you mind telling me which adapter you bought?

09-18-2014, 05:06 AM   #9
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QuoteOriginally posted by Smolk Quote
I used the 75mm on the K-x and it was easier than the SMC Takumar 1.8/85mm (no compensation to factor in, unlike the Takumar)
What do you mean by "compensation factor"?
09-18-2014, 05:30 AM   #10
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QuoteOriginally posted by adwb Quote
Do you mind telling me which adapter you bought?
I usually get my adapters from fotodioxpro.com . They are pricier but ensure infinity focus. I think I bought the one I have from eBay or Amazon. I do not remember. I have to look it up.

I bought a Pentax 6x7 to Canon EOS adapter from an eBay vendor and it did not work properly. I ended up buying the same thing from fotodiox and it worked. I became a fotodiox fan from that point on. As I mentioned they want more money for their adapters but at least they are US based and they stand behind their products.
09-18-2014, 07:21 AM   #11
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thanks to every one for the comments, one further question comes to mind,

I am aware that I will need to focus with the lens wide open then stop down to what either my sekonic meter suggests or the body meter wants via the green button, but will there be any significant gain in IQ from these 3 lenses when used on a a k5 rather than a old manual or A series PK mount lens of similar focal length?

A f2.8 55mm, and a f2.8 75mm and a f3.5mm 150mm.
09-19-2014, 01:19 PM   #12
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The SMC-A 55/2.8 is OK, but not great. I'd go for the 55 SDM kit lens, or the 45-85/4.5 there. The kit lens isn't much better at the cornders, also Needs to be stopped down significaantly (f/11 for optimal results), but in the Center it is very good at f/2.8, while the SMC-A isn't good at f/2.8 at any place in the pciture.


The 75/2.8 and the 150/3.5 are great on the 645D. They are bargains. Stop them one stop down and they are sharp to the very Corner.
09-21-2014, 05:08 PM   #13
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QuoteOriginally posted by carpents Quote
What do you mean by "compensation factor"?
On the K-x (and it may depend on the body), I had to dial in + or -EV sometimes. I cannot remember exactly why, but I do remember reading that the K-7 did not suffer from this to the same extent as the K-x. The 645 lens was just plain easy to use. Iíve sold my Takumar lenses and the 645>K adapter so I cannot check it anymore.
10-24-2014, 06:43 PM   #14
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I have used nothing but 645 and 6x7 lenses from film cameras from day one. I have 3 auto focus and 6 manual focus lenses. I have shot both stationary and action subjects. I come from pre- auto focus days, so , as long as I get the shutter speed and aperture right, I find a way to follow the action.
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