What is the purpose of this Lhires III adapter set?
This adapter set is designed to securely mount a camera onto a Shelyak Lhires III spectroscope, ensuring the camera's sensor is positioned at the correct optical distance. It is specifically made for cameras that have a native backfocus between 32.85mm and 36.85mm.
Why is the 34mm backfocus so important for the Lhires III spectroscope?
The Lhires III's optical system is designed to form a sharp spectrum at a very specific focal plane. If the camera sensor is too close or too far, spectral lines will appear blurred and the instrument's resolving power will be compromised. This adapter guarantees the critical 34mm nominal spacing is achieved.
How do I know if my camera is compatible with this Lhires III adapter?
Check your camera's technical documentation for its backfocus, sometimes called "sensor to flange distance." If this value is within the 32.85mm to 36.85mm range, this adapter is the correct solution for connecting it to your Lhires III.
Can I use this adapter set with a spectroscope other than the Lhires III?
No. This adapter set is custom-designed for the specific mechanical threads and required focal distance of the Shelyak Lhires III spectroscope. It is not compatible with other instruments.
I have a planetary camera with 12.5mm of backfocus. Will this adapter work with my Lhires III?
No, this adapter will not work. It is designed for cameras with a much longer native backfocus of around 34mm. To use a camera with 12.5mm of backfocus, you would need a different solution involving extension tubes to make up the distance difference.
If I use this adapter with my Lhires III to study the spectrum of Vega (Alpha Lyrae), will it ensure correct focus?
Yes. Provided your camera's backfocus is within the specified 32.85mm to 36.85mm range, this adapter places the sensor at the correct plane. This allows you to achieve a sharply focused spectrum of bright stellar targets like Vega, which is essential for detailed analysis.
