ProTama (SQ-100) HD Square Filter Series

Germany Optical Glass
2mm Glass Thickness
2 sides Nano Multi-Coating
2 sides Water & Oil Repellent Coating
2 sides Scratch & Stain Resistant Coating

Overview:

ProTama square filter is made of German optical glass. The use of Schott optical glass gives our square filters the excellent properties of chemical resistance, high-temperature resistance, and abrasion resistance. With an ultra thin noble metal multi-coating, ProTama square filters are a low reflection and able to avoid color differences while it also being water, stain, and scratch resistant.

ProTama (SQ-100) Square Filter - Description

GND (Graduated Neutral Density)

This filter is a half neutral density and a half clear. As the limited latitude of digital cameras cannot allow for shooting environments with strong light/dark ratios, GND filters are often used to balance the light contrast between strong and weak light.

ProTama (SQ-100) Square Filter 100x150 (GND8, GND16, GND32, GND64) - Germany Optical Glass

RGND (Reverse Graduated Neutral Density)

This filter is a half neutral density and a half clear in reverse. As the limited latitude of digital cameras cannot allow for shooting environments with strong light/dark ratios, GND filters are often used to balance the light contrast between strong and weak light.

HGND (Hard Graduated Neutral Density)
The filter is a hard half neutral density and a hard half clear. As the limited latitude of digital cameras cannot allow for shooting environments with strong light/dark ratios, GND filters are often used to balance the light contrast between strong and weak light.
ProTama (SQ-100) Square Filter 100x150 (RGND8, RGND16, HGND8) - Germany Optical Glass

ProTama (SQ-100) Square Filter 100x150 (RGND8, RGND16, HGND8) - Germany Optical Glass

ND (Neutral Density)

This filter is used to reduce the amount of light entering the lens without affecting the image colors. ND filters are one of an important tool to reduce light, with the ND filter, photographers are able to capture an image with large aperture and shallow depth of field under strong sunlight, and it can attain long-time exposure too.
ProTama (SQ-100) Square Filter 100x100 (ND8, ND16, ND8) - Germany Optical Glass

ProTama (SQ-100) Square Filter 100x100 (ND8, ND16, ND8) - Germany Optical Glass

ProTama (SQ-100) Square Filter - Nano Multi-Coating, Water & Oil Repellent Coating, Scatch & Stain Resistant Coating

The traditional neutral density filter isn't perfect since they don’t reduce the intensity of all wavelengths equally. More importantly, a good quality of ND filter should perform an equal wavelength. To have a good performance, we spent a long period on grinding and polishing with our Germany Optical Glass during the manufacturing process. This greatly produces a smooth and balanced surface of HD quality glass. With a rough surface glass which will cause diffuse reflection and it’ll affect telephoto zoom lenses couldn’t in focus.

ProTama (SQ-100) Square Filter - the different between traditional ND filter and ProTama ND filter

ProTama (SQ-100) Square Filter - why the filter needs 2 sides multi-coating

ProTama (SQ-100) Square Filter - Photo Sample (with GND Square Filter & without GND Square Filter)

ProTama (SQ-100) Square Filter - Photo Sample (with RGND Square Filter & without RGND Square Filter)

ProTama (SQ-100) Square Filter - Photo Sample (with HGND Square Filter & without HGND Square Filter)

ProTama (SQ-100) Square Filter - Photo Sample (with ND Square Filter & without ND Square Filter)

ProTama (SQ-100) Square Filter Packing - Package included a leather pouch and a microfiber cleaning cloth (25x25cm)

ProTama (SQ-100) Square Filter Holder Packing - Package included a square filter holder, a extra clip holder and a hex screwdriver

ProTama (SQ-100) Square Filter Holder (For 100x100/100x150mm) - Description

ProTama (SQ-100) Square Filter Holder Adapter Ring - Packing, description and available size (67mm-86mm, 72mm-86mm, 77mm-86mm, 82mm-86mm)

Square Filter Installation:

ProTama (SQ-100) Square Filter - Square Filter Installation

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