Quick Answer
To choose the right Fujinon protection filter, check the filter thread diameter printed on your lens barrel or lens cap, then select the matching PRF size (43mm, 46mm, 72mm, or 105mm).
Why Filter Size Matters
Using a filter that is too small will not thread onto your lens, while a filter that is too large will not fit securely. The correct size ensures a snug fit that protects the front element from dust and dirt without affecting image quality.
Fujinon protection filters are available in common diameters like 43mm, 46mm, 72mm, and 105mm. Match the diameter exactly to your lens's filter thread size.
Trade-offs: Larger vs. Smaller Filters
Larger filters like the PRF-72 and PRF-105 are typically used on telephoto or wide-aperture lenses, offering a wider front element but adding more weight and cost. Smaller filters like the PRF-43 and PRF-46 are lighter and more affordable, but they are only compatible with smaller-diameter lenses.
If you own multiple lenses with different filter sizes, you may need to buy separate filters for each. Consider investing in a step-up ring to use one larger filter across multiple lenses, but note that this may affect vignetting on some wide-angle lenses.
Decision Rules for Choosing the Right Size
- Check your lens barrel or cap: Look for the filter diameter printed on the lens barrel (e.g., Ø46mm) or on the front lens cap. This is your exact filter size. Always confirm the number before purchasing.
- Match the diameter exactly: Select the PRF filter with the same diameter as your lens. For example, if your lens shows 46mm, choose the PRF-46. Do not guess or round up. A precise match ensures a secure fit and proper protection.
- Consider future lenses: If you plan to buy lenses with different filter sizes, either purchase a filter for each size or use a step-up ring to share one larger filter. Note that step-up rings can add bulk and may cause vignetting on wide-angle lenses. Plan ahead to avoid multiple purchases.
Fujinon Protection Filter Options
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PRF-43 Fujinon Protection Filter: The PRF-43 Fujinon Protection Filter features Super EBC coating that limits harmful reflections with a surface reflectivity of 0.3% or less. This means you get clear, glare-free images while protecting your lens from dust and dirt.
PRF-43 Fujinon Protection Filter
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PRF-46 Fujinon Protection Filter: The PRF-46 Fujinon Protection Filter is designed to protect the lens from dust or dirt and uses Super EBC coating for effective reflection control. It's a reliable choice for lenses with a 46mm filter thread, offering both protection and optical clarity.
PRF-46 Fujinon Protection Filter
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PRF-72 Fujinon Protection Filter: The PRF-72 Fujinon Protection Filter is designed to protect the lens from dust or dirt, with Super EBC coating that achieves a surface reflectivity of 0.3% or less. This larger filter is ideal for bigger front elements, ensuring minimal reflections and robust protection.
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PRF-105 Fujinon Protection Filter: The PRF-105 Fujinon Protection Filter is designed to protect the lens from dust or dirt, featuring Super EBC coating for effective reflection control. This is the largest option, suitable for professional-grade lenses with a 105mm filter thread, offering maximum protection without compromising image quality.
Who Should Choose Which Size
Best For
- Photographers with a single lens who want a simple, lightweight protection solution matching their exact filter thread size.
- Owners of larger-diameter lenses (e.g., 72mm or 105mm) who prioritize maximum protection and are willing to carry extra weight.
Not For
- Photographers who own multiple lenses with different filter sizes and prefer to avoid buying separate filters—consider using a step-up ring instead.
- Those seeking a universal solution for all lenses; a single filter size will not fit every lens.
