Pentax Glass for 645z

ru2far2c · 10-27-2014, 07:42 AM

Originally posted by 2351HD

Not interested in zooms, you should be in the new 28-45, its a gem.

My view on lenses is like this, if you have a weather sealed kit, but have to change lenses, whats the point? Cant change lenses in the rain really.

Great point! Not much of a foul weather photographer. That could change in the future though. The lens coverage would be perfect for my needs. The 25mm may be a little much.

From what I've read thus far the usable range of the 645z is 100-6400 which would more than make up for the minimum ƒ2.8-4 of some lenses.

So how is the speed of the auto focus on the newer lenses? Could go back to film days to zone focus for event work. Think the files would be over kill.

---------- Post added 10-27-14 at 11:07 AM ----------

Originally posted by mikeSF

OP, there's a good bit of info in the lens reviews section. I recommend you go through those if you haven't already.
In my experience shooting with the 645D, my favorite lenses are DFA25, A35, DFA55, A120Macro. I find the A45 and A75 to be decent, perhaps not as stunning as the aforementioned.
I also use some 67 lenses on the 645D: SMC105 and M*300 and they both perform superbly on that format.
To your other question, I do not find the 35 to be wide enough for interiors, definitely want to try to get a 25.
Good luck and have fun shopping!

Now that I have the knowledge of 6x7 glass will work with 645 via an adapter that opens up a new set of lenses to look into. Really want something in the 70-120 range for portrait work. 150-180 may be a little long for my needs. Like the 25mm may be a little on the wide side. The beauty of a file this size one can always crop to taste. When I shot 6x6 film did most of my work with a 60, 80 and 120 then digital came along.

Lens review has been helpful. Went there before posting.

dgdb · 10-30-2014, 01:19 AM

Originally posted by 2351HD

I do yes. It was between that or the 25 and it won for the zoom, OS and the filter thread.

I am taking more handheld shots now with the OS too. The lens is sharp with little CA.

No difference between it and the 25, but it's more flexible. I now have my kit down to a 28-45 and 80-160 and am waiting on the replacement for that too.

Some say that with the 25 you can zoom with your feet, I can step back a meter and get the 25 fov too, plus I can zoom in on those times when you can't step forward.

Whatever works for you, I shot with primes for a long time with leica so I learnt the composition thing then but moved on now.

Thanks. I will buy 28-45. On 80-160 I am not so sure, I would like to have f/2.8 or even more, so I will stick to my 55 and 90, althought not much happy with 55. I am very interested in new lenses, hope they come soon :-)

Victor Wolansky · 11-07-2014, 08:39 AM

Originally posted by 2351HD

I do yes. It was between that or the 25 and it won for the zoom, OS and the filter thread.

I am taking more handheld shots now with the OS too. The lens is sharp with little CA.

No difference between it and the 25, but it's more flexible. I now have my kit down to a 28-45 and 80-160 and am waiting on the replacement for that too.

Some say that with the 25 you can zoom with your feet, I can step back a meter and get the 25 fov too, plus I can zoom in on those times when you can't step forward.

Whatever works for you, I shot with primes for a long time with leica so I learnt the composition thing then but moved on now.

You say there is no difference between the 25 and the zoom, do you actually own, or owned the 25 to make the comparison? Or you are just assuming there is no difference? I'm asking because I own the 25 and the reasons you mention that made you go for the zoom are totally valid for me, but I have yet to see a zoom with the same optical quality of a prime..

desertscape · 11-07-2014, 02:45 PM

Originally posted by Victor Wolansky

but I have yet to see a zoom with the same optical quality of a prime..

Ahhh, then you have never met the 55-100 zoom for the 6x7.

2351HD · 11-07-2014, 06:40 PM

Originally posted by Victor Wolansky

You say there is no difference between the 25 and the zoom, do you actually own, or owned the 25 to make the comparison? Or you are just assuming there is no difference? I'm asking because I own the 25 and the reasons you mention that made you go for the zoom are totally valid for me, but I have yet to see a zoom with the same optical quality of a prime..

Yes I have the 28-45 and also a good friend has the 25 and we have been on several trips using it. Comparing the shots, other than focal length I would say that I feel the zoom is actually better. But that is more of a feeling rather than substantiated claim.

Using filters is a big plus for me. For my friend not so much as he does heavy processing and blending and not much long exposure work, whereas I love long exposures.

Victor Wolansky · 11-07-2014, 07:32 PM

Originally posted by 2351HD

Yes I have the 28-45 and also a good friend has the 25 and we have been on several trips using it. Comparing the shots, other than focal length I would say that I feel the zoom is actually better. But that is more of a feeling rather than substantiated claim.

Using filters is a big plus for me. For my friend not so much as he does heavy processing and blending and not much long exposure work, whereas I love long exposures.

Thanks! Looking forward to see it. I have a good amount of 100mm filters that I would love to use without having to make strange experiments to mount them. But is kind of redundant I think to keep the 25 and the zoom. I think the zoom is a newer release right? so it might be better glass....

---------- Post added 11-07-14 at 07:34 PM ----------

Originally posted by desertscape

Ahhh, then you have never met the 55-100 zoom for the 6x7.

No I have not... I'm pretty new to the medium format, coming from Canon L glass, and actually seen over the time zooms that are better than primes, like the new Canon 24-70 L II, whn compared with the 24 L, it is way better, but is also way newer :-)))))

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10-27-2014, 07:42 AM	#16
ru2far2c New Member Join Date: Oct 2014 Location: Ecuador Posts: 19 Original Poster	Originally posted by 2351HD Not interested in zooms, you should be in the new 28-45, its a gem. My view on lenses is like this, if you have a weather sealed kit, but have to change lenses, whats the point? Cant change lenses in the rain really. Great point! Not much of a foul weather photographer. That could change in the future though. The lens coverage would be perfect for my needs. The 25mm may be a little much. From what I've read thus far the usable range of the 645z is 100-6400 which would more than make up for the minimum ƒ2.8-4 of some lenses. So how is the speed of the auto focus on the newer lenses? Could go back to film days to zone focus for event work. Think the files would be over kill. ---------- Post added 10-27-14 at 11:07 AM ---------- Originally posted by mikeSF OP, there's a good bit of info in the lens reviews section. I recommend you go through those if you haven't already. In my experience shooting with the 645D, my favorite lenses are DFA25, A35, DFA55, A120Macro. I find the A45 and A75 to be decent, perhaps not as stunning as the aforementioned. I also use some 67 lenses on the 645D: SMC105 and M*300 and they both perform superbly on that format. To your other question, I do not find the 35 to be wide enough for interiors, definitely want to try to get a 25. Good luck and have fun shopping! Now that I have the knowledge of 6x7 glass will work with 645 via an adapter that opens up a new set of lenses to look into. Really want something in the 70-120 range for portrait work. 150-180 may be a little long for my needs. Like the 25mm may be a little on the wide side. The beauty of a file this size one can always crop to taste. When I shot 6x6 film did most of my work with a 60, 80 and 120 then digital came along. Lens review has been helpful. Went there before posting.

10-30-2014, 01:19 AM	#17
dgdb Junior Member Join Date: May 2014 Posts: 42	Originally posted by 2351HD I do yes. It was between that or the 25 and it won for the zoom, OS and the filter thread. I am taking more handheld shots now with the OS too. The lens is sharp with little CA. No difference between it and the 25, but it's more flexible. I now have my kit down to a 28-45 and 80-160 and am waiting on the replacement for that too. Some say that with the 25 you can zoom with your feet, I can step back a meter and get the 25 fov too, plus I can zoom in on those times when you can't step forward. Whatever works for you, I shot with primes for a long time with leica so I learnt the composition thing then but moved on now. Thanks. I will buy 28-45. On 80-160 I am not so sure, I would like to have f/2.8 or even more, so I will stick to my 55 and 90, althought not much happy with 55. I am very interested in new lenses, hope they come soon :-)

11-07-2014, 08:39 AM	#18
Victor Wolansky Inactive Account Join Date: Oct 2014 Posts: 91	Originally posted by 2351HD I do yes. It was between that or the 25 and it won for the zoom, OS and the filter thread. I am taking more handheld shots now with the OS too. The lens is sharp with little CA. No difference between it and the 25, but it's more flexible. I now have my kit down to a 28-45 and 80-160 and am waiting on the replacement for that too. Some say that with the 25 you can zoom with your feet, I can step back a meter and get the 25 fov too, plus I can zoom in on those times when you can't step forward. Whatever works for you, I shot with primes for a long time with leica so I learnt the composition thing then but moved on now. You say there is no difference between the 25 and the zoom, do you actually own, or owned the 25 to make the comparison? Or you are just assuming there is no difference? I'm asking because I own the 25 and the reasons you mention that made you go for the zoom are totally valid for me, but I have yet to see a zoom with the same optical quality of a prime..

11-07-2014, 02:45 PM	#19
desertscape Pentaxian Join Date: Feb 2009 Location: Arizona Posts: 1,272	Originally posted by Victor Wolansky but I have yet to see a zoom with the same optical quality of a prime.. Ahhh, then you have never met the 55-100 zoom for the 6x7.

11-07-2014, 06:40 PM	#20
2351HD Veteran Member Join Date: Apr 2013 Location: Brisbane, Australia Photos: Albums Posts: 750	Originally posted by Victor Wolansky You say there is no difference between the 25 and the zoom, do you actually own, or owned the 25 to make the comparison? Or you are just assuming there is no difference? I'm asking because I own the 25 and the reasons you mention that made you go for the zoom are totally valid for me, but I have yet to see a zoom with the same optical quality of a prime.. Yes I have the 28-45 and also a good friend has the 25 and we have been on several trips using it. Comparing the shots, other than focal length I would say that I feel the zoom is actually better. But that is more of a feeling rather than substantiated claim. Using filters is a big plus for me. For my friend not so much as he does heavy processing and blending and not much long exposure work, whereas I love long exposures.

11-07-2014, 07:32 PM	#21
Victor Wolansky Inactive Account Join Date: Oct 2014 Posts: 91	Originally posted by 2351HD Yes I have the 28-45 and also a good friend has the 25 and we have been on several trips using it. Comparing the shots, other than focal length I would say that I feel the zoom is actually better. But that is more of a feeling rather than substantiated claim. Using filters is a big plus for me. For my friend not so much as he does heavy processing and blending and not much long exposure work, whereas I love long exposures. Thanks! Looking forward to see it. I have a good amount of 100mm filters that I would love to use without having to make strange experiments to mount them. But is kind of redundant I think to keep the 25 and the zoom. I think the zoom is a newer release right? so it might be better glass.... ---------- Post added 11-07-14 at 07:34 PM ---------- Originally posted by desertscape Ahhh, then you have never met the 55-100 zoom for the 6x7. No I have not... I'm pretty new to the medium format, coming from Canon L glass, and actually seen over the time zooms that are better than primes, like the new Canon 24-70 L II, whn compared with the 24 L, it is way better, but is also way newer :-)))))