Heliopan Bay 2 KR-15 (85B) Color Conversion Glass Filter
Heliopan Bay 2 KR-15 (85B) Color Conversion Glass Filter
B&H # HEKR15B2 MFR # 720019
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Product Highlights
- Rugged Brass Filter Ring
- High Quality Schott Glass
This item is noncancelable and nonreturnable.
Heliopan 720019 overview
- 1Description
The Heliopan Bay 2 KR15 (85B) Glass Filter will produce natural colors when shooting with tungsten film outdoors. Using tungsten film in daylight will produce a bluish cast in the photograph.
What do you do when you must take some photos outdoors and all you have left is tungsten film? Using tungsten film in daylight will produce a bluish cast in the photograph. The 85 series of filters will "bring back", i.e. color balance the tones in your images. These yellow filters are used to correct differences in color temperature between the recording medium (film/video) and the light source.
An 85B filter converts tungsten film to daylight. An 85C produces the coolest results - more than either the 85 or 85B. However, it is interesting to remember that an 85C is also useful as a creative warming filter with daylight film in daylight.
Heliopan Lichtfilter-Technik of Munich, Germany, has changed their black anodized brass filter rings on most Heliopan non-rotating filters to their "slim" mounts. These slim mounts are made of black anodized brass stock and have so little rim in front of the lens (5.4mm) that they will not vignette with lenses as short as 21mm.
Heliopan offers a wide selection of sizes, screw-in, series, bayonet, square and rectangular filters including digital, video, center weighted, graduated, wide angle, Kaesmann polarizers, drop-in polarizers, etc.
Note: Whereas the 85 series is used for tungsten film under daylight conditions, use the 80 series of filters when using daylight film under tungsten lighting. This filter is specific to lenses with Rollei's exclusive B2 (Bay 2) filter size
- Although the KR15 is used for the same photographic situation as the KR12, this dark brown filter is the better choice when photographing areas with very clear air or high daylight temperature (midday summer sun
- A #85 filter will produce slightly cooler results than an 85B
- Heliopan cuts, grinds, polishes and coats their filters with the same techniques and equipment as used for the finest German camera lenses
- All Heliopan screw-in type and series size filters are mounted in precision black anodized brass rings to eliminate binding or cross threading and to ensure optimal alignment
- Filters still retain front threads for a lens cap, a lens hood or even stacking a second filter
- The portion of the Heliopan slim filters that are in front of the lens have been reduced in thickness by 37% over the former mount
- Whereas the 85 series is used for tungsten film under daylight conditions, use the 80 series of filters when using daylight film under tungsten lighting
85 Series Color Conversion Chart
- An 85 decreases the color temperature from 5500-3400K
- An 85A decreases the color temperature from 5500-3100K
- An 85B decreases the color temperature from 5500-3200K
- An 85C decreases the color temperature from 5500-3800K
- 1Description
Heliopan 720019 specs
| Type | Color Conversion |
| Size | Bay 2 |
| Grade | 85B |
| Filter Factor | 1.8 (+2/3 stop) |
| Multi-Coated | Not Applicable |
| Rotating | Not Applicable |
| Effect | Removes excessive blue from images and produces more natural colors |
| Application | When pleasing color balance is desired when shooting with tungsten film outdoors |
| Color Temperature | Decreases the color temperature from 5500-3200K |
| Construction | Schott Glass |
| Front Filter Thread Size | Bay 2 |
| Front Lens Cap Size | Bay 2 |
