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09-05-2016, 08:49 AM   #1
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Help Deciding on Which lens for my 645Z

I have the FA 75/2,8 I use for my walk around lens. I was thinking of gettingSMC Pentax-FA 645 45-85mm F4.5 instead. Any Suggestions greatly appreciated. Thanks, Dennis

09-05-2016, 11:40 AM   #2
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The 45-85 would make a pretty heavy walk around system and as I recall, the 45-85 while quite good at the wide end, is so-so at the long end. I own the Z as well and I would use the 55mm if I could only use one lens for walk around shooting.
09-05-2016, 11:55 AM   #3
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Personally I use three primes, but Iʻm shooting film so the 75mm is a normal, whereas on the 645Z and 44mm x 33mm sensor, itʻs a bit of a telephoto. +1 with CDW on the 55mm prime as a better walk around lens and the 75mm for portraits.

Once you invest in a great WR medium format sensor, going cheap on a lens makes no sense as the sensor will outperform the lens. So if you must have a walk-around zoom, then itʻs the pricey 28-45mm f/4.5 with all-weather construction.

HD Pentax-DA 645 28-45mm F4.5 ED AW SR Reviews - 645 Zoom Lenses - Pentax Lens Reviews & Lens Database

Usually because primes are smaller, I take my dorky khaki photographers vest to keep my primes handy in the pockets and also have a wide angle prime like the 25mm prime all-weather with the 55mm.

SMC Pentax-D FA 645 25mm F4 AL [IF] SDM AW Reviews - 645 Wide-Angle Primes - Pentax Lens Reviews & Lens Database

When I got into medium format, I couldnʻt afford it, and I couldnʻt afford not to have it, so it was a long term investment. It took awhile to pay for it, but I have no regrets. Also with the primes, youʻll be getting a much faster lens (larger aperture, AF speed in low light, brighter viewfinder).
09-05-2016, 02:34 PM   #4
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I just recently (6 months) purchased the FA 90mm F2.8 and could not be more pleased. Its 2Lbs plus the 645Z puts it at around 5.5Lbs which is a tad heavy for me for a walk around but a good strap system makes it a mute point IMHO. The 90 is fantastic all around with two notes: 1. the IS is a little noisy, 2. In dim/dark lighting it struggles to autofocus at times. I've sold everything including my Cannon gear (3 bodies + 6 lens) and limited myself to the 90 and the 28-45, two very spectacular lens that are as sharp/sharper than my 85mm F/1.2L II or 200mm F/2L.

09-05-2016, 03:24 PM   #5
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Thank you for your input. Its helps with a decision.
09-28-2016, 12:38 PM   #6
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Another idea is to get the A35 - it's a bit wide (and low weight) but often that works well for a walk around lens. Also there is the DFA 55 and similar focal lengths available. I use the A35 a lot more than the other lens on my camera.
09-28-2016, 04:21 PM   #7
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For walkaround personally for me it'd be between the 55 & 75.

The 55 is sharper, has more colour/contrast & better af.

The 75 has a bit more compression.

Hard call. I have both. I think if I was shooting people it'd be the 75, for anything else the 55.

The 90 is obviously superior to both but personally a bit long for a general walk around lens to me.
09-30-2016, 02:24 PM   #8
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If only Pentax would get off their bums and release the 45-90 zoom that's been on the roadmap for 3 years and you would have problem solved.

After traveling heaps with my 645d and Z, I would say that a 45-85 would be the ideal 1 lens kit, it's just the current one is not that great.

---------- Post added 10-01-16 at 07:30 AM ----------

QuoteOriginally posted by Alex645 Quote
So if you must have a walk-around zoom, then itʻs the pricey 28-45mm f/4.5 with all-weather construction.

SMC Pentax-D FA 645 25mm F4 AL [IF] SDM AW Reviews - 645 Wide-Angle Primes - Pentax Lens Reviews & Lens Database
Terrible suggestions, the 28-45 is far from walk around, I have one. It's amazing but not to be taken far from the trekking backpack.

The 25 is dead in the water and not available, top that with the fact it had its share of build issues.

If not the 45-85, I would say for a 2 lens combo the new DFA 35 and the FA 80-160. The 80-160 is as sharp as the DFA 90 at 90mm and f/8, plus it can zoom out to 150 where it's still sharp.

09-30-2016, 05:30 PM   #9
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QuoteQuote:
Terrible suggestions, the 28-45 is far from walk around, I have one. It's amazing but not to be taken far from the trekking backpack.

The 25 is dead in the water and not available, top that with the fact it had its share of build issues.

If not the 45-85, I would say for a 2 lens combo the new DFA 35 and the FA 80-160. The 80-160 is as sharp as the DFA 90 at 90mm and f/8, plus it can zoom out to 150 where it's still sharp.
If I don't agree with someone else's post, I'm not going to say that advice is terrible. Yes, the 28-45mm is a whopping three pounder, but I've walked and trekked all day with three camera and extra lenses in a photo vest with a heavy duty tripod to get the coverage I wanted and needed. My personal choice would be lighter primes, but the context was if I had to only take one zoom. There is a reason it is an AW lens, and that wasn't for it to sit in a studio.

I respect your opinion, but don't disrespect others. One man's ceiling is another man's floor.
09-30-2016, 07:52 PM - 1 Like   #10
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There was nothing disrespectful about it. You recommended to a forum user asking for advice, to purchase a discontinued lens that was known for having faults (such as falling apart), which isn't available anywhere. Am I missing something?

My apologies if you took offense.

---------- Post added 10-01-16 at 12:58 PM ----------

Here is the problem with Pentax, right here in this thread.

We are approximately 7 years into the Pentax 645 digital era and they have released 4 lenses, of which one was a re-hash/new version of an old lens.

As a system owner who wants the best, Pentax are letting us down with the slow train product development and no lens releases that were promised. Re-releasing 25 year old lenses doesn't cut it, the 28-45 quality and 90mm quality proves that.
09-30-2016, 08:47 PM   #11
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QuoteOriginally posted by 2351HD Quote
You recommended to a forum user asking for advice, to purchase a discontinued lens that was known for having faults (such as falling apart), which isn't available anywhere. Am I missing something?


---------- Post added 10-01-16 at 12:58 PM ----------

Here is the problem with Pentax, right here in this thread.

We are approximately 7 years into the Pentax 645 digital era and they have released 4 lenses, of which one was a re-hash/new version of an old lens.
The market for used discontinued lenses for Pentax is very active and just today a friend texted me that he found a shelf of 645 lenses at Advance Camera in Hillsboro, Oregon.

I understand the frustration that Ricoh isnʻt cranking out new lenses like Canon and Nikon, but neither of those companies even offer MF. Pros that have the funding go with Phase One or Hasselblad; pros and prosumers who canʻt afford those use the more affordable systems.

So yes, it would be great to have many new or updated lenses available; but Iʻd rather Pentax take the slow road and alive then too fast and bankrupt.
09-30-2016, 08:56 PM   #12
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But I don't get the "release a body" and "they will find the lenses used" idea that Pentax has.

If they focus on releasing the core lenses then they make money.......

None of the lenses that they have released are core lenses. Pentax's biggest following is in landscape, not portraiture or commercial. But they released a 55/2.8 and 90/2.8 before releasing the core landscape zooms.

It's just all ass about it my view.
09-30-2016, 09:05 PM   #13
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These are my two shoulder bag kits: (i) FA 300mm, FA 150mm, A 55mm, and DA 25mm (645D) or (ii) FA 150-300mm, P67 55-100mm, and DA 28-45mm (645Z). Both give great results. You could use the first kit with the 75mm instead of the 55mm.
10-01-2016, 09:28 AM   #14
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Actually I rather like the 45-85 as a walk around kit with the Z, and it is not to heavy. ( I am 68) At 45 it is better as the prime. Only at the end it gets a bit worth. But with these focal lenghts you are able to get a lot done.
I like wide so usually I put the A 35 in my pocket. The 28-45 seems to be terrific but it is heavy and pricey, and I don't want to spend the dough on it. A real landscape lens you go out with with a tripod and a Range Rover.
I would prefer Pentax to come up with a 23/4 like Fuji does. I like to walk around in towns and citys and keep things a bit lighter.
Pentax should make clear where they go from here.....
10-04-2016, 12:07 AM   #15
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QuoteOriginally posted by 2351HD Quote
Terrible suggestions, the 28-45 is far from walk around, I have one. It's amazing but not to be taken far from the trekking backpack.

Well, I guess it depends on people... 28-45 is my walk around lens, for the moment.
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