Sigma Teleconverter - 1.4x EX DG
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Wex Photo VideoSigma 1.4x Teleconverter EX DG APO Camera Lens Adapter Black
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Product Information
Full details
The Sigma 1.4x EX DG APO Teleconverter is for photographers seeking to extend the reach of their existing Sigma lenses without purchasing new ones. Its key benefit is a 1.4x focal length increase, effectively bringing distant subjects closer while maintaining optical quality and autofocus speed. A caveat is the potential for a slight decrease in maximum aperture. This teleconverter attaches between your lens and camera body, offering a cost-effective way to achieve longer focal lengths for wildlife, sports, and portrait photography.
All features
| Brand | SIGMA CORPORATION OF AMERICA |
|---|
Extended Product Information
FAQs
Will this teleconverter work with any lens?
No, this teleconverter is designed specifically for certain Sigma lenses. Always check the official Sigma compatibility list for your lens model.
What does the '1.4x' mean?
It means the teleconverter multiplies the focal length of your attached lens by 1.4. For example, a 300mm lens becomes a 420mm lens.
Does it affect the aperture?
Yes, it reduces the maximum aperture of the lens by one full stop. A lens with a maximum aperture of f/2.8 will have a maximum aperture of f/4 when used with this teleconverter.
Can I use this with my DSLR camera?
The 'DG' designation means it is optimized for full-frame digital SLRs. Compatibility can vary, so check Sigma's official documentation for your specific camera model.
Does it change the minimum focusing distance?
No, the teleconverter maintains the original minimum focusing distance of the attached lens.
How do I clean the teleconverter lens elements?
Use a soft lens brush or blower to remove dust. For smudges, use a microfiber lens cloth and a small amount of lens cleaning solution, wiping gently from the center outwards.
What is the difference between EX and DG designations?
EX denotes Sigma's superior build and optical quality. DG signifies optimization for digital SLRs, particularly full-frame sensors, offering high contrast and reduced reflections.
Will autofocus work as fast as without the teleconverter?
Autofocus speed is generally well-maintained, especially in good lighting. In very low light conditions, autofocus might be slightly slower compared to using the lens alone.
Troubleshooting
Autofocus is slow or inaccurate.
Ensure the teleconverter is securely attached to both the lens and the camera body. Check that your lens is on Sigma's compatibility list for this teleconverter. In very low light, manual focus may be more reliable.
Image quality is degraded (softness, color fringing).
Verify that the lens used is compatible and optimized for DG. Clean the lens elements and teleconverter glass. Ensure Super Multi-Layer Coating is functioning effectively by minimizing direct light sources that could cause flare.
Teleconverter does not mount to lens or camera.
Check that you are attempting to mount it on a compatible Sigma lens and camera body. Ensure no debris is obstructing the mounting points.
Exposure seems incorrect.
Remember that the teleconverter reduces the maximum aperture by one stop. Ensure your camera is set to correctly meter this change. Auto-exposure should compensate, but verify settings if results are consistently off.
Pros and Cons
Pros
- Effectively extends lens reach by 40% without changing minimum focus distance.
- Maintains high optical performance and AF speed with compatible lenses.
- Cost-effective alternative to purchasing longer telephoto lenses.
- APO and EX designations ensure superior image quality and build.
- Compatible with full-frame digital SLRs.
- Compact and lightweight design.
Cons
- Reduces the maximum aperture by one stop (e.g., f/2.8 becomes f/4).
- Compatibility is limited to specific Sigma lenses.
- May slightly affect autofocus performance in very low light conditions.
- Adds an extra element, potentially introducing minor optical compromises compared to a native lens.
- Not compatible with all camera bodies or third-party lenses.
Setup, Compatibility & Care
Setup
- Ensure both the teleconverter and your camera lens are clean.
- Align the mounting indicators on the teleconverter and the lens.
- Gently insert the teleconverter into the lens mount and rotate until it clicks into place.
- Align the camera body's mounting indicator with the teleconverter's indicator.
- Attach the camera body to the teleconverter and rotate until it clicks.
Compatibility
This teleconverter is designed for use with specific Sigma lenses and full-frame digital SLRs. Always check Sigma's official compatibility list for your specific lens model before purchasing.
Care
- Store the teleconverter in its protective case when not in use.
- Avoid touching the lens elements. Use a blower to remove dust.
- Clean the lens elements with a soft lens brush or microfiber cloth and appropriate lens cleaning solution if necessary. Wipe gently in a circular motion from the center outwards.
- Keep away from moisture and extreme temperatures.
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