The Helios 44-2 is one of the most iconic Soviet lenses, known for its distinctive swirly bokeh and excellent image quality. If you own this lens or are planning to get one, you might be wondering about the correct cap size and other relevant dimensions. Let’s clarify the details.
Lens Cap Diameter
The Helios 44-2 lens requires a cap that fits its front element properly. The correct cap size depends on whether you're using a screw-on or a slip-on cap:
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Screw-on filter thread diameter: 49mm (M49×0.75)
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Slip-on lens cap diameter: 54mm
If you're looking for a replacement cap, make sure to choose one that matches these dimensions to ensure a secure fit.
Additional Lens Specifications
To better understand how accessories like filters and hoods fit, here are some key technical specifications of the Helios 44-2:
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Focal length: 58mm
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Maximum aperture: f/2.0
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Minimum aperture: f/16
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Optical construction: 6 elements in 4 groups
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Filter thread size: 49mm
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Minimum focusing distance: 0.5m
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Mount: M42 screw mount
- You can buy 3 options - Original, Anamorphic Mod, Cine Mod, Petzval mod, Trioplan mod. You can find them in our store.
Lens Hood Compatibility
If you’re looking to add a lens hood to reduce flare and enhance contrast, the ideal screw-in hood should fit a 49mm thread. However, if you're using a slip-on hood, a 55mm diameter would be more appropriate.
SEO Optimization & Buying Guide
For those searching for replacement lens caps or filters, using search terms like "Helios 44-2 49mm lens cap" or "Helios 44-2 54mm slip-on cap" can help you find the right accessory online.
If you're interested in more information about Soviet lenses, their advantages, and how they compare to modern alternatives, check out our other blog posts on vintage lenses!
Final Thoughts
Choosing the right cap size for your Helios 44-2 lens ensures better protection and longevity for your gear. Whether you're a collector or an active photographer, having the correct accessories will help you maintain your lens in top condition.
Need help finding the right cap or accessories? Browse our store for high-quality replacements and more vintage lens gear!
You can also check out our comparison articles on Helios 44M vs. Helios 44-2 and Helios 44M-4 vs. Helios 44-2 to learn more about their differences and which one suits your needs best.