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01-25-2016, 04:51 PM   #1
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New 28-45 lens or 645Z?

Hi there!

I currently own a Pentax 645D with the following lenses:

A 35mm f/3.5
D-FA 55mm f/2.8
FA 75mm f/2.8
A 150mm f/3.5

I am primarily a landscape photographer (also very keen on portraits).

Being so, I was considering to get the DA 28-45mm zoom, but what if I kept my current lens setup and opted for the 645Z instead? It would be more or less the same price. The new Z seems to be a huge step forward from the D...

Many thanks in advance for your thoughts and opinions!

Kind regards,
Baldomero


Last edited by bcoelho; 01-25-2016 at 04:59 PM.
01-25-2016, 05:14 PM - 1 Like   #2
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A tough one that. You may find many people split on this one...

How long do you have to decide?

In your position I would probably go for the body as it is a significant step forward. That being said, the 28 - 45 is a great, if heavy lens. What you have so far lens wise is certainly good enough.

I would put together a list of pros and cons of each option...
01-25-2016, 05:21 PM   #3
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Thanks!

Not much time, unfortunately... Maybe a week.

It could be a compromise not to go for the 28-45, since I would really like to go as wide as possible. But on the other hand, from what I've seen the dynamic range of the Z leaves the D a few miles behind...

Cheers!
01-25-2016, 05:21 PM - 1 Like   #4
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I would definitely go for the Z here. You have the most useful part of that zooms range covered already and the Z is a pretty big improvement over the D especially in the ISO department.

Remember, you also gain the Pixel Shift feature of the Z which is fantastic. You can use it on landscapes to produce 200mp images. It can have some weirdness if something in frame is moving (such as a smoking chimney).

The zoom is a versatile zoom and, if good enough, could enable you to sell your 35mm but I think with the bump in resolution and the pixel shift, cropping your images differently is more versatile.

01-25-2016, 05:25 PM - 1 Like   #5
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Here's something to start your pros/cons.


For the Z: High iso capability of the Z offers more opportunity to handhold (don't always have to carry a tripod)


For the 28-45: A little bit wider than the 35 and, being a zoom, could reduce lens swaps. For what it's worth I seem to have a lot more problems with sensor dust with the Z than I've ever had with any k-mount camera, and I'm not doing any more lens swapping than with k-mount. Maybe a function of medium format?


Against the 28-45: If you're hiking very far with it you'll end up taking the A35 instead to save weight (at least I would. Maybe you're in better shape than me).
01-25-2016, 05:27 PM - 1 Like   #6
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QuoteOriginally posted by bcoelho Quote
Thanks!

Not much time, unfortunately... Maybe a week.

It could be a compromise not to go for the 28-45, since I would really like to go as wide as possible. But on the other hand, from what I've seen the dynamic range of the Z leaves the D a few miles behind...

Cheers!
Look for RAW files of Z files and see what you can do with them and see if the files suit your shooting style. I'd still be inclined to do t he body first in this instance...
01-25-2016, 05:30 PM - 1 Like   #7
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QuoteOriginally posted by Float Quote
Remember, you also gain the Pixel Shift feature of the Z which is fantastic. You can use it on landscapes to produce 200mp images. It can have some weirdness if something in frame is moving (such as a smoking chimney).

There is no pixel shift on the 645z. The sensor is fixed in place, unlike the K-3II which can be moved to allow high res shots. Which is also why the 645z doesn't have in-body stabilization.
01-25-2016, 05:32 PM - 2 Likes   #8
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I'd probably lean toward upgrading the body. It's a pretty big step forward. Personally I'm a bit biased against zooms on medium format, though.


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01-25-2016, 05:33 PM - 1 Like   #9
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QuoteOriginally posted by Adam Quote
I'd probably lean toward upgrading the body. It's a pretty big step forward. Personally I'm a bit biased against zooms on medium format, though.
I'm bias against zooms on Pentax cameras in general :P

---------- Post added 01-25-16 at 06:38 PM ----------

QuoteOriginally posted by jrpower10 Quote
There is no pixel shift on the 645z. The sensor is fixed in place, unlike the K-3II which can be moved to allow high res shots. Which is also why the 645z doesn't have in-body stabilization.

Whoops! My apologies. Not sure why I thought it had it.
01-25-2016, 06:33 PM - 1 Like   #10
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Wow, what a great problem to have!

I shoot landscapes 100% from a tripod and always stick to ISO 100, so the additional high ISO performance of the Z is a little lost on me.

That said, I have found the pop out screen and focus peaking in Live View to be extremely useful. Good luck deciding.
01-25-2016, 06:36 PM - 1 Like   #11
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I recommend getting the Z, selling the D, if your budget would then allow to replace the A35 with the D-FA35. There are a lot of situations where you can do a panorama to get the wider capture.
01-25-2016, 07:41 PM - 1 Like   #12
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both are amazing but I'd do the body first.
01-25-2016, 08:19 PM - 1 Like   #13
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It depends if you need wide angle or not.

If the 28-45 had been out when I bought the Z, I would have bought the zoom first. Too many times I needed wider angle and the 35mm just wasn't enough.

You can get around the DR issue if you are a landscape user on a tripod. Some PS tricks like luminosity masks can help. I am not a fan also of recovering 4-5 stops from the shadows, particularly if you are going to print big.

That's said I have both the zoom and the Z now. I also regret selling the 645D, there are many times I would like to have the choice to use the D over the Z for some scenes, it rendered well.
01-25-2016, 08:30 PM - 1 Like   #14
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Upgrade body. Remit $.02 USD via PayPal.
01-26-2016, 01:45 AM - 1 Like   #15
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If you are mainly a landscape photographer and you don't need the 55mm's f/2.8 aperture for other types of photography, I'd sell the 645D, 35mm and 55mm and buy the 645z and 28-45mm to replace them all (if your budget allows with the help of the three sales). 645z, 28-45mm, 75mm and 150mm (perhaps replacing the 150mm with the 120 macro, if you find it, to add some macro capability to your kit shall you need it) is a dream kit for the landscape photographer. That's the kit I am taking with me next week going to the south-west U.S.A.
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