Pentax smc Pentax-FA645 35mm F3.5 AL [IF] Medium Format Lens (2015)
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Product Overview
Pentax smc Pentax-FA645 35mm F3.5 AL [IF] is an ultra wide-angle prime lens for the Pentax 645 KAF2 bayonet. It covers the 645 medium format image circle. Introduced by Pentax in 2015, it has 10 elements in 7 groups.
Unfortunately, Pentax has opted to omit weather sealing for this lens, so owners should pay extra attention when shooting in incremental weathers. On the lens barrel, one can find a physical aperture ring. Those who wish to focus manually can have the best of both worlds (with the usual caveats).
As an ultra wide-angle prime lens that happens to have relatively small maximum aperture, it is best suited for landscape photography. Even though the lens is not stabilized, at this focal range it does not usually matter. In fact, some may be able to get cleaner corners without image stabilization.
Ratings
What we found**
Neofiliac score 68% (not directly comparable across industries)
Pros
- 0.25x reproduction ratio
- Rather compact for what it is
- Comes with physical aperture ring
Cons
- Lacks weather sealing
Price Comparison
Specifications
Construction
Aperture Blades
9 blades, Rounded aperture
Form Factor
Ultra Wide-Angle Prime Lens
Image Size
Medium Format (645)
Lens Barrel
Physical aperture ring, Distance scale
Lens Mount
Pentax 645 KAF2 bayonet
Optical Formula | Elements
10 elements
Optical Formula | Groups
7 groups
Optical Formula | Special Glass
HRI and hybrid aspherical elements, HD and SP coatings groups
Dimensions
Filter Diameter
82 mm / 3.23 in
Size | Diameter
88 mm / 3.46 in
Size | Length
90 mm / 3.54 in
Weight
570 g / 20.14 oz
Function
Angle Of View
89.9° Diagonal | 79.4° Horizontal | 57.9° Vertical
Aperture
f/3.5 ~ f/32
Autofocus
Yes
Crop Factor
0.6
Focal Length
35 mm
Focal Length (35mm Equivalent)
21.7 mm
Focus Type
Internal
Image Stabilization
No
Weather Resistance
No
Performance
Max Magnification
0.25x
Min Focus Distance
300 mm / 11.81 in
Production
Accessory
Lens Hood: PH-RBE82 (supplied)
Debut
2015-11-11
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