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09-01-2020, 05:37 AM   #1
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645 FA 55-110 mm f/5.6 ED zoom lens

An inexpensive 645 zoom lens with a useful focal range (equivalent to a 45-90 mm zoom in FF) capable of resolving 4000 lines on a 645Z sensor (51 Mpx).



---------- Post added 09-01-20 at 08:38 AM ----------



09-01-2020, 04:14 PM   #2
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BATISCAN River. Pentax 645Z + FA 55-110 mm f/5.6 ED @ 55 mm and f/16.


Resolution is at 3900 lines @ 55 mm FL.

Last edited by RICHARD L.; 09-03-2020 at 06:08 AM.
09-02-2020, 06:02 AM   #3
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BATISCAN River, Pentax 645Z + FA 55-110 mm f/5.6 ED @ 80 mm FL and f/16.


Resolution is at 4030 lines @ 80 mm FL.

Last edited by RICHARD L.; 09-03-2020 at 06:11 AM.
09-03-2020, 06:00 AM   #4
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BATISCAN River. Pentax 645Z + FA 55-110 mm f/5.6 ED @ 110 mm FL and f/16.


Resolution is at 3750 lines @ 110 mm FL.


Last edited by RICHARD L.; 09-03-2020 at 06:09 AM.
09-04-2020, 06:18 AM   #5
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Dreamy water flow. 645Z + FA 55-110 mm f/5.6 + CPL. 1/5 sec @ f/45.


Diffraction killed resolution but it's the mood created by this effect that's important, not so much the descriptive quality.
09-06-2020, 06:50 PM   #6
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Sunset, FA 55-110 mm f/5.6 @ f/14 and 98 mm FL.



No flare, no ghosts, excellent contrast and sharpness.
09-07-2020, 12:09 AM   #7
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Evening along the Saint Lawrence. 645Z + FA 55-110 mm f/5.6 @ 55 mm FL.

Low tide reveals wet shoals along the Saint Lawrence. How to not like such a lens ?
Attached Images
View Picture EXIF
PENTAX 645Z  Photo 

Last edited by RICHARD L.; 09-07-2020 at 08:07 AM.
09-10-2020, 07:22 AM   #8
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Low tide, St Lawrence River. 645Z + FA 55-110 mm f/5.6 @ 110 mm FL and f/13.




Last edited by RICHARD L.; 09-10-2020 at 08:55 AM.
09-16-2020, 01:46 PM   #9
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Now the vertical version ...

09-21-2020, 08:16 AM   #10
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I have a 67 Pentax 55-100 mm f/4.5 zoom lens as easy to use on a 645Z as a 645 lens.



As sharp, if not sharper than the 645 55-110 mm f/5.6 zoom. Colors seem a little cooler (bluish) though. Heavy lens with manual focus and necessitates a Pentax 67 to 645 adapter, but works seamlessly in Av mode.
09-22-2020, 05:57 AM   #11
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67 Pentax 55-100 mm f/4.5 @ 55 mm FL and f/11. Sharp, no flaring.

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