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08-16-2019, 09:45 AM   #1
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Zoom lens for landscape photography

Hi everybody,
I have a question regarding 645 zoom lens.
I bought recently a 645z with the standard 55mm lens (very happy with my choice).
I would like to get a zoom lens, something in between 45mm and 160mm (not necessarily this exact range). I read different review on the forum, but so far canít make a decision.
Can someone help me with that ?
I intend to use this lens for landscape only, most of the time on a tripod.
Sharpness is critical although Iím aware that it will probably never compare with prime lenses (I stop down most of the time so wide opening softness is not an issue as long as itís sharp at f11)
Minimal aperture is neither an issue.
AF I can do whitout.
Weight is not too much of an issue either.
Any suggestions, recommendations ? Thank in advance.
Joseph

08-16-2019, 11:59 AM - 1 Like   #2
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One option you may not have considered is the 55-100 zoom that was made for the 67 system. An excellent lens in sharpness, contrast and has low distortion. It compares well with the 67 primes in performance. A 67 to 645 adapter is necessary however. I believe there are a few shooters on this forum who have used it on their Z.
08-16-2019, 12:01 PM - 1 Like   #3
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what's your price range?

I don't use the 645 system, but I think there's only one modern zoom that fits that range:
Pentax P-645 AF 80-160mm F4.5 Lens | McBain Camera Canada
Review:
SMC Pentax-FA 645 80-160mm F4.5 Reviews - 645 Zoom Lenses - Pentax Lens Reviews & Lens Database

There's also an A version:
SMC Pentax-A 645 80-160mm F4.5 Reviews - 645 Zoom Lenses - Pentax Lens Reviews & Lens Database
08-17-2019, 12:28 AM   #4
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SMC 45-85 F4.5 seems to have gotten good reviews.
And I have seen the FA version on ebay for under $200 for used ones.

08-17-2019, 09:22 AM - 1 Like   #5
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I recently acquired a used FA 645 80-160. It nicely fills the bill for me in that range.
08-17-2019, 01:32 PM   #6
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Original Poster
Thank you all for the good advices.
I didn't though of a A67 lens but in fact the 55-100 for 67 system sounds as a perfect fit for my need (and budget).
I read good comments about it and a A67 to 645 adapter seems easy to find.
08-18-2019, 02:14 AM - 1 Like   #7
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I have both the FA 45-85mm and FA 80-160mm, both brilliant in their own right. The 45-85 being wider and to me more suited as a landscape lens, while the 80-160mm can be used for landscape aslo, but great for portraiture too. Both for me sharp after 5.6 across the frame, and both optimal at f/8...... Both also useable wide open....

Only down side for some maybe the weight of the 80-160mm......

All in all, brilliants lens and can be prick up cheap, esp the 80-160mm, I got mine for $238 AU
08-21-2019, 12:44 AM   #8
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QuoteOriginally posted by Timotis77 Quote
I have both the FA 45-85mm and FA 80-160mm, both brilliant in their own right. The 45-85 being wider and to me more suited as a landscape lens, while the 80-160mm can be used for landscape aslo, but great for portraiture too. Both for me sharp after 5.6 across the frame, and both optimal at f/8...... Both also useable wide open....

Only down side for some maybe the weight of the 80-160mm......

All in all, brilliants lens and can be prick up cheap, esp the 80-160mm, I got mine for $238 AU
Both were supposed to be updated (D-FA, probably) for 2016 or later... so if OP is in a hurry, let's forget it

09-07-2019, 03:47 AM   #9
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I first acquired both the A 45-85 mm and the A 80-160 mm zooms for landscape photography with my 645Z. I used them on a Manfrotto tripod mostly around f/11 and f/16. I recently found nice FA versions of both on eBay and upgraded to Autofocusing. I can't find any difference in the results using either A or FA versions of the same lens. If I could keep only one lens for the 645Z, it would be the 45-85 mm f/4.5 zoom.
Regards, Richard
09-18-2019, 11:01 AM   #10
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Thank you all for your good advices.
I eventually decided to get a FA 45-85 which I found at a reasonable price on eBay.
The first tests I made are quite satisfying. At 55mm f16 the result are quite comparable with my 55mm prime.
I will probably add a longer zoom later.
Iím travelling in Ireland next month, can wait to see how it perform !
Best regards, Joseph.
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