The SVBONY SV193 0.8X Focal Reducer and Field Flattener is an essential accessory for astrophotography, designed for refractor telescopes like the SV503 80mm F7 ED. It helps achieve clear and sharp celestial photos by reducing focal length and flattening the field, minimizing star point distortion at the edges of images.
Crafted from durable aluminum alloy with a hard anodized finish, this accessory is built for strength and longevity while keeping weight down. It features a 3-element, 2-group lens structure with fully multi-coated (FMC) optics for high transmittance and superior views.
Key Features:
* Designed for astrophotography to reduce focal length by 0.8X and flatten the field.
* Minimizes star point distortion at the edge of photos, ideal for wide-field imaging.
* Front end features a standard 2-inch socket for connecting to the main lens.
* Back end has M48x0.75 threads for connecting to camera bayonets, supporting Full Frame Cameras.
* Accepts 2-inch filters with a standard filter thread for light pollution filters.
* 0.8X defocusing system shortens exposure times, beneficial for astrophotographers.
* Default back-intercept of 55mm.
* Can be used with a 3600 field rotator (sold separately) for flexible composition.
* Solid metal aluminum alloy construction with a hard anodized finish.
* Lens Structure: 3-Elements/2Groups with FMC coating and blackened lens edges.
* Net Weight: 164g.
⚠️ WARNING (California Proposition 65): This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, please visit www.P65Warnings.ca.gov.
Frequently Asked Questions
Q: What materials is the SVBONY SV193 Focal Reducer made of?A: The SVBONY SV193 Focal Reducer is made of solid aluminum alloy. This strong and durable material provides a hard anodized finish that helps reduce weight.
Q: What are the dimensions of the SVBONY SV193 Focal Reducer?A: The SVBONY SV193 has a length of four point eight four inches, a width of three point eight one inches, and a height of three point five eight inches. These dimensions make it a compact accessory for telescope use.
Q: What is the backfocus measurement of the SVBONY SV193?A: The backfocus of the SVBONY SV193 is fifty-five millimeters. This specification is crucial for achieving the correct focal length with various telescope setups.
Q: How do you install the SVBONY SV193 Focal Reducer?A: To install the SVBONY SV193, connect the standard two-inch socket to the main lens. Then, attach the M48x0.75 threaded back end to your camera bayonet.
Q: Is the SVBONY SV193 suitable for astrophotography?A: Yes, the SVBONY SV193 is ideal for astrophotography. Its design minimizes distortion of star points, helping you capture clear celestial images.
Q: Does the SVBONY SV193 accept filters?A: Yes, the SVBONY SV193 accepts two-inch filters. It includes a standard two-inch filter thread for adding light pollution filters as needed.
Q: How should I clean the SVBONY SV193 Focal Reducer?A: To clean the SVBONY SV193, use a soft, lint-free cloth and lens cleaning solution. Avoid abrasive materials to prevent scratches on the lens surface.
Q: Is the SVBONY SV193 safe to use with a full-frame camera?A: Yes, the SVBONY SV193 is compatible with full-frame cameras. Its design accommodates a wide range of photographic equipment.
Q: What is the weight of the SVBONY SV193 Focal Reducer?A: The SVBONY SV193 weighs one hundred sixty-four grams, or five point seven eight ounces. This lightweight design enhances portability for outdoor use.
Q: How do I store the SVBONY SV193 Focal Reducer?A: Store the SVBONY SV193 in a protective case to prevent scratches and damage. Keep it in a cool, dry place away from direct sunlight.
Q: Is the SVBONY SV193 suitable for beginners?A: Yes, the SVBONY SV193 is suitable for beginners. Its user-friendly design and clear instructions make it accessible for novice astrophotographers.
Q: Can the SVBONY SV193 be used with a telescope other than the SV503?A: Yes, the SVBONY SV193 can be used with various refractor telescopes. Ensure compatibility with the two-inch socket and M48x0.75 thread.
Q: What type of lens structure does the SVBONY SV193 have?A: The SVBONY SV193 features a three-elements, two-groups lens structure. This design enhances optical performance and image quality.
Q: What is the purpose of the SVBONY SV193 Focal Reducer?A: The SVBONY SV193 serves as both a focal reducer and a field flattener. It allows for shorter exposure times while maintaining image sharpness.
Q: Does the SVBONY SV193 come with any accessories?A: Yes, the SVBONY SV193 includes one focal reducer and two rubber dust covers. These accessories help protect the reducer when not in use.