Optolong L-eXtreme Narrowband Filter - Clip Filter for Sony FF Cameras
Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Contiguous US / Lower 48:
Free shipping applies to orders over $50 using our chosen carrier/method. Faster paid options are available at checkout.
Alaska, Hawaii & US Territories:
Free shipping applies to many—but not all—products. Enter your ZIP code in cart or upon checkout to confirm options and costs.
International:
International orders do not qualify for free shipping. Shipping, duties, brokerage, tariffs, and taxes are the customer’s responsibility. Some items may be restricted due to export, size, or manufacturer limitations.
- Dual 7nm bandpass design isolates H-alpha and OIII emission lines
- Helps reduce light pollution and moonlight for darker sky backgrounds
- Designed for Sony full-frame cameras with convenient clip-in installation
- Well suited for emission nebula imaging and fast optical systems
L-eXtreme of Sony-FF Clip-In Filter - 2025 Version
The Optolong L-eXtreme is a dual 7nm bandpass filter designed for use with one-shot color cameras, including DSLRs, as well as monochrome CCD cameras. It is also well suited for fast optical systems. Its convenient and cost-effective design allows amateur astrophotographers to capture rich emission nebulae even under bright, light-polluted skies.
The L-eXtreme isolates the Hydrogen-alpha (H-alpha) and Oxygen III (OIII) emission lines, helping maximize contrast and improve the signal-to-noise ratio between emission nebulae and the surrounding sky. This makes it particularly useful for imaging from heavily light-polluted locations or when the Moon is present.
Unlike the Optolong L-eNhance, which uses a tri-band design transmitting H-beta, H-alpha, and OIII, the L-eXtreme uses a dual-band design that passes only H-alpha and OIII. By eliminating transmission between the H-beta and OIII regions where there are no major nebular emission lines, the filter further reduces unwanted light pollution. This helps produce a darker sky background while preserving important nebular signals.
Hydrogen is the most abundant element in the universe and plays a major role in many astronomical objects. The L-eXtreme focuses on key hydrogen and oxygen emission wavelengths while reducing transmission from other portions of the spectrum, helping astrophotographers isolate important nebular structures with greater contrast.
The L-eXtreme in Action!
Optolong L-eXtreme Sony Full-Frame Compatibility
- Compatible Cameras: Sony A7, A7 II, A7 III, A7 IV, A7R, A7R II, A7R III, A7R IV, A7R V, A7S, A7S II, A7S III, and A9
- Compatible Lenses: Full range of Sony E-mount primary and auxiliary lenses
- Filter Type: L-eXtreme Sony Full-Frame Clip-In Filter
Optolong notes that it has tested popular lenses rather than every available lens, so compatibility with less common lenses may vary.
Specifications
- Raw Material: Optical Glass
- Thickness: 1.0 mm
- Blocking Range: 300-1000nm
- Blocking Depth: Light Pollution Line Blocking >99%
- Surface Quality: 60/40
- Surface Shape: λ/4
- Parallelism: 30s
Filter Installation
Installation Schematic Diagram:
- Put the camera body flat, with the top of the filter marked “OPTOLONG” (the magnetic suction is on the back) into the body first.
- Fix it by hand at the top, then adjust the filter position. It is now ready for imaging.
Removing the Filter:
- After placing the camera body flat, use the triangular tool to gently tilt the filter and remove it once it is loosened.
- Be sure to avoid scratching the lens and the camera!
Other Information
- Country of Manufacture: China
L-eXtreme of Sony-FF Clip-In Filter - 2025 Version
The Optolong L-eXtreme is a dual 7nm bandpass filter designed for use with one-shot color cameras, including DSLRs, as well as monochrome CCD cameras. It is also well suited for fast optical systems. Its convenient and cost-effective design allows amateur astrophotographers to capture rich emission nebulae even under bright, light-polluted skies.
The L-eXtreme isolates the Hydrogen-alpha (H-alpha) and Oxygen III (OIII) emission lines, helping maximize contrast and improve the signal-to-noise ratio between emission nebulae and the surrounding sky. This makes it particularly useful for imaging from heavily light-polluted locations or when the Moon is present.
Unlike the Optolong L-eNhance, which uses a tri-band design transmitting H-beta, H-alpha, and OIII, the L-eXtreme uses a dual-band design that passes only H-alpha and OIII. By eliminating transmission between the H-beta and OIII regions where there are no major nebular emission lines, the filter further reduces unwanted light pollution. This helps produce a darker sky background while preserving important nebular signals.
Hydrogen is the most abundant element in the universe and plays a major role in many astronomical objects. The L-eXtreme focuses on key hydrogen and oxygen emission wavelengths while reducing transmission from other portions of the spectrum, helping astrophotographers isolate important nebular structures with greater contrast.
The L-eXtreme in Action!
Optolong L-eXtreme Sony Full-Frame Compatibility
- Compatible Cameras: Sony A7, A7 II, A7 III, A7 IV, A7R, A7R II, A7R III, A7R IV, A7R V, A7S, A7S II, A7S III, and A9
- Compatible Lenses: Full range of Sony E-mount primary and auxiliary lenses
- Filter Type: L-eXtreme Sony Full-Frame Clip-In Filter
Optolong notes that it has tested popular lenses rather than every available lens, so compatibility with less common lenses may vary.
Specifications
- Raw Material: Optical Glass
- Thickness: 1.0 mm
- Blocking Range: 300-1000nm
- Blocking Depth: Light Pollution Line Blocking >99%
- Surface Quality: 60/40
- Surface Shape: λ/4
- Parallelism: 30s
Filter Installation
Installation Schematic Diagram:
- Put the camera body flat, with the top of the filter marked “OPTOLONG” (the magnetic suction is on the back) into the body first.
- Fix it by hand at the top, then adjust the filter position. It is now ready for imaging.
Removing the Filter:
- After placing the camera body flat, use the triangular tool to gently tilt the filter and remove it once it is loosened.
- Be sure to avoid scratching the lens and the camera!
- 1x Clip Filter
- 1x PP Material Storage Case
- Lining: Imported high pressure white EVA material
- Dual 7nm bandpass design isolates H-alpha and OIII emission lines
- Helps reduce light pollution and moonlight for darker sky backgrounds
- Designed for Sony full-frame cameras with convenient clip-in installation
- Well suited for emission nebula imaging and fast optical systems
L-eXtreme of Sony-FF Clip-In Filter - 2025 Version
The Optolong L-eXtreme is a dual 7nm bandpass filter designed for use with one-shot color cameras, including DSLRs, as well as monochrome CCD cameras. It is also well suited for fast optical systems. Its convenient and cost-effective design allows amateur astrophotographers to capture rich emission nebulae even under bright, light-polluted skies.
The L-eXtreme isolates the Hydrogen-alpha (H-alpha) and Oxygen III (OIII) emission lines, helping maximize contrast and improve the signal-to-noise ratio between emission nebulae and the surrounding sky. This makes it particularly useful for imaging from heavily light-polluted locations or when the Moon is present.
Unlike the Optolong L-eNhance, which uses a tri-band design transmitting H-beta, H-alpha, and OIII, the L-eXtreme uses a dual-band design that passes only H-alpha and OIII. By eliminating transmission between the H-beta and OIII regions where there are no major nebular emission lines, the filter further reduces unwanted light pollution. This helps produce a darker sky background while preserving important nebular signals.
Hydrogen is the most abundant element in the universe and plays a major role in many astronomical objects. The L-eXtreme focuses on key hydrogen and oxygen emission wavelengths while reducing transmission from other portions of the spectrum, helping astrophotographers isolate important nebular structures with greater contrast.
The L-eXtreme in Action!
Optolong L-eXtreme Sony Full-Frame Compatibility
- Compatible Cameras: Sony A7, A7 II, A7 III, A7 IV, A7R, A7R II, A7R III, A7R IV, A7R V, A7S, A7S II, A7S III, and A9
- Compatible Lenses: Full range of Sony E-mount primary and auxiliary lenses
- Filter Type: L-eXtreme Sony Full-Frame Clip-In Filter
Optolong notes that it has tested popular lenses rather than every available lens, so compatibility with less common lenses may vary.
Specifications
- Raw Material: Optical Glass
- Thickness: 1.0 mm
- Blocking Range: 300-1000nm
- Blocking Depth: Light Pollution Line Blocking >99%
- Surface Quality: 60/40
- Surface Shape: λ/4
- Parallelism: 30s
Filter Installation
Installation Schematic Diagram:
- Put the camera body flat, with the top of the filter marked “OPTOLONG” (the magnetic suction is on the back) into the body first.
- Fix it by hand at the top, then adjust the filter position. It is now ready for imaging.
Removing the Filter:
- After placing the camera body flat, use the triangular tool to gently tilt the filter and remove it once it is loosened.
- Be sure to avoid scratching the lens and the camera!
Other Information
- Country of Manufacture: China
- 1x Clip Filter
- 1x PP Material Storage Case
- Lining: Imported high pressure white EVA material
Optolong L-eXtreme Narrowband Filter - Clip Filter for Sony FF Cameras