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Auto Mamiya-Sekor  CS  1:4  f=300 mm

cs_300_4

This is another one of the rare and hard to find lenses for the Mamiya NC series.  So far, I´ve only seen it on eBay three or four times.  Since November 2002 I am now also a proud owner of this very nice lens.

The lens is surprisingly light-weight for its size.  It has a built-in lens hood and also a tripod mount.  The large minimum focusing distance of 5 meters is quite a drawback in my opinion.

I haven´t had a chance to test the optical performance of this lens, but I would assume that there is quite a bit of chromatic aberration due to the lack of special dispersion glass.

Construction:

5 elements in 4 groups

Angle of View:

Minimum Focusing Distance:

5 m (18 ft.)

Minimum Aperture:

f/16

Filter Size:

77 mm

Lens Hood:

built-in (also a tripod mount)

Weight:

780 g (27.3 oz.)

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cs_300_4_complete

Auto Mamiya-Sekor CS 300 mm 1:4 with built-in lens hood extended and both lens caps.

Using the Built-In Tripod Mount

cs_300_4_tripod

Mamiya NC 1000 S with Auto Mamiya-Sekor CS 300 mm 1:4 mounted on a tripod using the built-in
tripod mount.  This gives much better stability compared to using the camera tripod mount.  It also
enables very easy and fast change from horizontal to vetical format.

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