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ASAHI PENTAX 6X7- Gelatin Filter Holder

Reviews Views Date of last review
2 2,893 Mon December 26, 2016
Recommended By Average Price Average User Rating
100% of reviewers None indicated 8.50
ASAHI PENTAX 6X7- Gelatin Filter Holder

Pentax 6X7 67mm Gelatin Filter Holder. 2 piece construction with a slot at the top for 2 3/4" square gelatin filter insertion.

Available in 67mm, 82mm & 100mm diameters.
Price History:

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Site Supporter

Registered: October, 2008
Location: Vancouver, Canada
Posts: 6,310
Review Date: December 26, 2016 I can recommend this item: Yes | Price: None indicated | Rating: 7 

Pros: Saves on filter costs.
Cons: Limited useage and gel filters are delicate to use.

Pentax made three 6x7 Gelatin Filter Frames/Holders in 67mm, 82mm & 100mm sizes. These are an old accessory from the early days of the 6x7 system and use the bayonet filter mount to attach to the front of the lens. You can mount either a screw-in, bayonet or clip-on lens hood to the front of the filter frame/holder, or a second filter or a lens cap.

The filter frame/holder accepts 75mm x 75mm (3 x 3 inches) gelatin filters, which you slide into the slot in the top of the mounted fame/holder.

Kodak Wratten 2 Optical Filters work perfectly and there are a wide range of choices:

Kodak Wratten 2 Optical Filters

The problem with these frames/holders is that over the years Pentax moved away from the bayonet filter system to the standard screw-in type. A lot of the last generation Pentax 67 lens dropped the bayonet filter thread and were screw-in only.

As a results you are limited to using the three frames/holders to the following lenses:

45/4 all versions (82mm)
55/3.5 all versions (100mm)
75/4.5 all versions (82mm)
75/4.5 Shift all versions (82mm)
90/2.8 all versions (67mm)
105/2.4 all versions (67mm)
135/4 Macro all versions (67mm)
150/2.8 all versions (67mm)
165/2.8 all versions (67mm)
200/4 early Takumar versions only (67mm)

The non ED 300/4 lenses (82mm) will accept the frame/holder but you will not be able to extend the built-in lens hood unless you cut the square corners off the gel filters.

These gelatin filter frames/holders were not a bad idea back in the day, but are pretty obsolete now. They would have been a lot more useful if they were screw-in and there were also versions in 77mm & 95mm. That way you could use them on almost all the Pentax 6x7 lenses as well as some 35mm format lenses.
Loyal Site Supporter

Registered: November, 2014
Location: Temple PA
Posts: 101
Review Date: March 27, 2016 I can recommend this item: Yes | Price: None indicated | Rating: 10 

Pros: Inexpensive gels for creative effects.
Cons: Pro Gelatin 75 X 75mm special order

Adapter fits only 6X7 bayonet lenses. Bay hoods mount to holder or you can use 67mm screw in hoods. Pro Gel filters give consistent results over glass filters although they are very fragile. Holder accepts 75 X75mm gels.
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