The Heliopan 27mm #5 Light Yellow Filter is a basic contrast filter, primarily for use with black and white film, that is primarily used as a haze filter to subtly darken blue tones and increase overall contrast. There is an approximate 1.5-2x filter factor with this filter, requiring an increase of 0.5 to 1 stop for normal exposure.

The front and rear surfaces of the filter both feature a single anti-reflection coating. Each coating helps to increase light transmission by reducing reflections, scattered light, and ghosting. Additionally, they offer protection to the filter substrate while helping to keep the glass clean for longer than uncoated glass.

This Heliopan filter is constructed from Schott glass for increased optical clarity and color fidelity. It features a brass filter ring for durability as well as jamming prevention.

#5 Filter for Enhanced B&W Contrast    1.5-2x Filter Factor, +0.5-1 Stop    27mm Front Filter Threads    Front and Rear Coating    Schott Glass Construction    Brass Filter Ring

Light yellow contrast filter for black and white film subtly darkens skies and blue tones, reduces haze, and increases overall contrast.

Single coatings on both the front and rear offer protection to the glass and help to improve light transmission and image quality.

Constructed from Schott glass for optical clarity.

Brass filter ring helps to prevent jamming and provides additional strength.

Dual threading with 27mm front filter threads permits combining with other filters.

Related Questions and Answers

Q: 1. Does this filter have front lens threads?

A: Yes, the Heliopan 40.5mm UV SH-PMC Filter has a 40.5mm front filter thread.

Q: 2. So, does this Digital Filter pretty much an even higher quality, more affective UV Filter?

A: Filters are made of the filter material, the glass it is in, the glass coatings and the metal ring. The higher the cost, the higher the quality of all materials and the better the optical result. After a point, however, it is like cars where you can get a comfortable Ford Focus (like Hoya) or a luxury BMW (like Heliopan.)

Q: 3. Is the Viltrox 27mm F/1.2 suitable for video capture?How well is the autofocus in video mode?

A: The Viltrox 27mm f/1.2 Lens (FUJIFILM X) has fast and accurate autofocus in video mode. It works very well for video recording.

Q: 4. Does it show the aperture onscreen when mounted in a Sony A6000?

A: Yes, the TTArtisan 27mm f/2.8 Lens (Sony E, Black) will display the aperture (F-number) on the screen of the Sony A6000 camera.

Q: 5. Can another filter be attached to the front of this one? (I.e. so you have two circular 77mm filters on your lens at once.)

A: Yes. I have 2 of those filters and I just checked - they can be stacked.

Q: 6. Will this fit a PVS-14 objective lens?

A: This will not work with that Model.

Q: 7. What is the range of filter diameters available goth the Series 7 & 8 filters?

A: I'm not sure I understand the question, can you rephrase?

Q: 8. Will all the features work on a Fuji X Pro 1?

A: limited features are applicable on FUJIFILM X-Pro1. Full features on the following pro bodies. FUJIFILM X-Pro2 FUJIFILM X-Pro3

Q: 9. What sizes, expressed in mm, are Series 7 filters available in?

A: A series 7 filter is a unique size as all series filters are. The fiter size in millimeters would be equivalent to 50.8mm.

Q: 10. How is the 'protection' capability of this lens, if I'm looking to replace my protection/UV filters with this one? And does it have 8 coatings, or one on each side? I've heard conflicting descriptions.

A: The filter has one coating per side to help with reflections and protection of the glass.