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| Pentax 100mm f4 macro lens |
This lens uses a "Heliar" optical design.
- Focal Length: 100mm
- Aperture Range: f4 thru f32 half stops thru to f22 6 blades
- Focus Travel: 350 degrees
- Close Focus: 45cm
- Filter threads: 49mm
- Weight; 370gm
Beautifully smooth focus ring, nicely damped, great lens.
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| Pentax 100mm f4 macro lens Close Focused |
This is a great lens if you like taking shots of insects. Its focal length allows a bit of clearance between you and your living subject, they tend to run or fly away given the chance.
Like its little brother the 50mm it exhibits no aberrations that I can see, no purple fringing no chromatic or general distortions. This lens at f4 does display a small amount of "Coma" at the edge of the frame, it disappears from f5.6 as shown in the picture below.
Pentax K100d 100mm macro at f5.6
No Coma visible
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| Eta Carina Region taken with Pentax 100mm f4 Macro Lens |
As well as being a close up lens it's also a 100mm telephoto, so if you have an "aps-c" sized sensor in your camera, you get a field of view equivalent to 150mm on "full frame".
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| Pentax 100mm F4 Macro 100% Crop |
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| Pentax 100mm f4 Macro |
more pics to follow
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