Need help?Do you have a question about the Pentax SMC A 645 45mm f/2.8 and is the answer not in the manual?
General| Focal Length | 45mm |
|---|---|
| Maximum Aperture | f/2.8 |
| Lens Mount | Pentax 645 |
| Format Compatibility | Medium Format |
| Minimum Focus Distance | 0.45 m |
| Filter Size | 67 mm |
| Number of Aperture Blades | 8 |
| Minimum Aperture | f/22 |
Guidelines on using the smallest aperture settings and their effects on depth-of-field and motion.
Details on Super-Multi-Coated filters and their benefits for image quality.
Best practices for handling and using lens filters to maintain image quality.
Guidance on selecting shutter speeds to avoid blur when hand-holding.
Understanding focus shift indications on telephoto lenses due to environmental factors.
Advice on using telephoto lenses for landscape photography, considering climate.
How telephoto lens focusing precision relates to subject distance.
Explanation of the dual-ring mechanism for focus and zoom on specific lenses.
Recommended method for achieving accurate focus with zoom lenses.
Understanding and managing optical distortion in zoom lenses.
Steps to follow when returning a lens for service under warranty.
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