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Compare Pentax-FA 77mm F1.8 vs Pentax DA 70mm F2.4 vs Pentax-FA 77mm F1.8

Construction

Aperture Blades
9 blades
9 blades, Rounded aperture diaphragm
9 blades
Colors
Black, silver
Black, Silver
Black, silver
Form Factor
Short Telephoto Prime Lens
Short Telephoto Prime Lens
Short Telephoto Prime Lens
Image Size
Full-Frame
APS-C
Full-Frame
Lens Barrel
Physical aperture ring, Distance scale, DoF scale
Distance scale, DoF scale
Physical aperture ring, Distance scale, DoF scale
Lens Mount
Pentax K-mount
Pentax K-mount
Pentax K-mount
Material
Aluminum
Aluminum
Motor
Screw drive from camera
Screw drive from camera
Screw drive from camera
Optical Formula | Elements
7 elements
6 elements
7 elements
Optical Formula | Groups
6 groups
5 groups
6 groups
Optical Formula | Special Glass
HD + Super Protect coatings groups
High-grade multi-layer HD (High Definition) Coating groups
HD + Super Protect coatings groups

Dimensions

Filter Diameter
49 mm / 1.93 in
49 mm / 1.93 in
49 mm / 1.93 in
Size | Diameter
64 mm / 2.52 in
63 mm / 2.48 in
64 mm / 2.52 in
Size | Length
48 mm / 1.89 in
26 mm / 1.02 in
48 mm / 1.89 in
Weight
270 g / 9.54 oz
147 g / 5.19 oz
270 g / 9.54 oz

Function

Angle Of View
31.4° Diagonal | 26.3° Horizontal | 17.7° Vertical
23.3° Diagonal | 19.5° Horizontal | 13.0° Vertical
31.4° Diagonal | 26.3° Horizontal | 17.7° Vertical
Aperture
f/1.8 ~ f/22
f/2.4 ~ f/22
f/1.8 ~ f/22
Autofocus
Yes
Yes
Yes
Crop Factor
1.5
Focal Length
77 mm
70 mm
77 mm
Focal Length (35mm Equivalent)
105.0 mm
Focus Type
Internal
Internal
Image Stabilization
No
No
No
Weather Resistance
No
No

Performance

Max Magnification
0.14x
0.12x
0.14x
Min Focus Distance
700 mm / 27.56 in
700 mm / 27.56 in
700 mm / 27.56 in

Production

Accessory
Lens hood included
Lens Hood: MH-RF49 (supplied)
Lens hood included
Debut
2021-02-24
2013-08-27
2021-02-24

Reviews

Neofiliac score
68%
76%
68%
Pros
  • Rather compact
  • Beautifully crafted
  • Comes with physical aperture ring
  • Good image quality
  • Smooth rendering
  • Exceptionally light and compact
  • Beautifully crafted
  • Rare 107mm equivalent pancake lens
  • Rather compact
  • Beautifully crafted
  • Comes with physical aperture ring
  • Good image quality
  • Smooth rendering
Cons
  • Lacks weather sealing
  • A bit expensive for a pancake lens
  • Lacks weather sealing

Price

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