Kase Night Focus Tool 100x100mm
Best current price£77.00from Wex Photo Video
Best offers
Shopping.co.uk recommended and popular offers
Wex Photo Video£77.00Visit shop Kase Night Focus Tool 100x100mm - MPN K100FT
Visit shopWex Photo Video£77.00Visit shop One Offer
1 offer from £77.00
View price history by clicking the chart icon.
Wex Photo VideoKase Night Focus Tool 100x100mm - MPN K100FT
Free delivery in 1–3 days
£77.00
Visit shop
Product Information
Full details
The Kase Night Focus Tool 100x100mm is designed for astrophotographers and anyone needing precise manual focus on nighttime subjects. Its primary benefit is achieving sharp focus on light sources, drastically reducing out-of-focus night images. A potential caveat is its specific use case, primarily for manual focusing rather than automated systems. This Bahtinov mask features thin etched lines on a flat surface to create pinpoint light diffraction patterns, aiding in accurate focusing.
All features
| Brand | Kase |
|---|
Extended Product Information
FAQs
What is a Bahtinov Mask?
A Bahtinov mask is an accessory used in astrophotography and manual focusing. It has a pattern of slots that creates a diffraction pattern from a point light source (like a star). When the pattern is perfectly symmetrical, the subject is precisely in focus.
Can I use this for daytime photography?
While technically possible to use for focusing on bright, distant objects during the day, it is primarily designed and most effective for nighttime photography due to the nature of light sources and contrast.
How do I attach the Kase Night Focus Tool to my lens?
The attachment method varies depending on your specific lens or telescope. Typically, it involves a frame or adapter that clips or screws onto the front element, or it may be held in place by a lens hood or filter system. Please refer to the specific mounting instructions for your equipment.
How does this help with focusing on man-made subjects at night?
Man-made subjects at night often involve distinct light sources (like streetlights, signs, or windows). The mask creates a sharp diffraction pattern from these lights, allowing you to visually adjust your focus ring for pinpoint sharpness on these specific points, ensuring your overall image is sharp.
What size light source do I need for it to work?
A moderately bright, distinct point or small source of light works best. Very large or diffuse light sources may not produce a clear enough diffraction pattern for precise focusing.
Does this tool autofocus?
No, the Kase Night Focus Tool is a manual focusing aid. It helps you achieve precise focus by eye using a visual indicator, but it does not automate the focusing process.
Can I use it with filters?
Compatibility with filters depends on the mounting system. If the Night Focus Tool mounts externally to a filter or lens hood, you might be able to use it in conjunction with other filters. Check your specific setup.
Troubleshooting
No clear diffraction spikes are visible.
Ensure the mask is securely and centrally mounted. Check that the light source is bright and distinct enough. Verify you are using manual focus mode and adjusting the focus ring.
Diffraction spikes are uneven and difficult to align.
Re-center the mask on the lens. Ensure the light source is not obstructed or too large. Practice adjusting the focus ring slowly and steadily.
Focus seems sharp, but the spikes are not perfectly symmetrical.
Fine-tune the focus ring with small adjustments. Ensure the lens is properly seated and not shifting. Some minor asymmetry may occur with very small or distant light sources.
Mask feels loose on the lens.
Check if you are using the correct mounting adapter or if any locking screws need tightening. Ensure the lens or housing is compatible with the mask's attachment method.
Pros and Cons
Pros
- Provides exceptional precision for manual focusing at night.
- Helps achieve sharp focus on distant or artificial light sources.
- Reduces the frustration of out-of-focus night photography.
- Durable construction suitable for field use.
- Easy to interpret the focusing pattern for quick adjustments.
Cons
- Primarily useful for manual focusing; not an automated solution.
- Requires a clear, distinct light source for optimal performance.
- May add a slight vignetting effect at wider apertures or extreme focal lengths.
- Requires careful alignment on the lens or telescope.
- Not designed for daytime terrestrial photography.
Setup, Compatibility & Care
Setup:
- Securely attach the Kase Night Focus Tool to the front of your lens or telescope. This may involve a clamp mechanism or specific adapter, depending on the mounting system. Ensure it is stable and centered.
- Identify a suitable, bright, and distinct light source in your scene.
- Look through your viewfinder or at your camera's live view. Adjust your lens's manual focus ring.
- Observe the diffraction pattern created by the light source. You will see three distinct spikes. Adjust focus until the central spike is perfectly positioned between the two outer spikes, forming a symmetrical starburst effect.
Compatibility:
This 100x100mm tool is designed to fit lenses or telescope housings that accommodate this size, often via a separate adapter ring or clip system. Always check compatibility with your specific equipment.
Care:
- Handle with care to avoid scratching the etched surface.
- Clean the surface gently with a soft, lint-free microfiber cloth. Avoid abrasive cleaners or solvents.
- Store in a protective case when not in use.