Sensor size and pixel scale — choosing the right camera for your telescope India
You have an Askar 71F astrograph with a 348mm focal length. Which camera sensor size works best with it? Does the Player One Uranus-C (IMX585, 1/1.2" sensor) cover the full field without vignetting? What pixel scale will you get — and does it match the seeing conditions at your imaging site in India?
These are the questions that determine whether your astrophotography images look outstanding or just average. The interactive calculator below answers all of them instantly.
Three key concepts — sensor size, pixel scale, field of view
Sensor size
Physical dimensions of the camera sensor. Larger = wider field of view at any focal length.
Pixel scale
How many arcseconds of sky each pixel covers. Determines how "zoomed in" your images are.
Field of view
Total sky area captured. Determined by sensor size ÷ focal length.
Interactive pixel scale and field of view calculator
Enter your telescope and camera specifications
1.72"
Pixel scale (arcsec/pixel)
73'
Field of view (width)
55'
Field of view (height)
Calculating...
Recommended pairings — EDISLA cameras + astrographs
| Astrograph | Best camera match | Pixel scale | Why it works |
|---|---|---|---|
| Askar 60F (348mm f/5.8) | Player One Neptune-664C ₹31,999 | 1.72"/px | Covers full APS-C. Wide field for large nebulae. Great value pairing. |
| Askar 71F (348mm f/4.9) | Player One Uranus-C ₹38,999 | 1.72"/px | Full sensor coverage confirmed. Fastest pairing. Best city imaging setup. |
| Askar 80ED (480mm f/6) | Player One Uranus-C ₹38,999 | 1.25"/px | Good scale for nebulae and clusters. Well-matched for seeing in India. |
| Askar 91F (499mm f/5.5) | Player One Uranus-C Pro ₹59,999 | 1.20"/px | Tight scale — best for compact objects. Full sensor coverage on 91F. |
| Celestron EdgeHD 9.25" (2350mm) | ZWO ASI585MC Air ₹1,09,999 | 0.25"/px | Very tight scale for planetary nebulae, galaxies. Demands excellent seeing. |
The India seeing guideline for pixel scale: Typical Indian seeing (atmospheric stability) from city sites is 2–4 arcseconds FWHM. This means pixel scales of 1.0–2.0"/pixel are optimal — you sample the seeing without oversampling. From excellent Indian dark-sky sites (Hanle, Merak in Ladakh), seeing can be 1.5–2.5" — pixel scales of 0.8–1.5"/pixel then become appropriate.
Frequently asked questions
What camera sensor size works with an Askar 71F in India?
The Askar 71F covers an APS-C image circle. The Player One Uranus-C (IMX585, 7.4×5.6mm sensor, ₹38,999) fits within this coverage with no vignetting and provides a pixel scale of approximately 1.72"/pixel at 348mm focal length — ideal for Indian seeing conditions. The pairing is confirmed and recommended by EDISLA.
What is pixel scale and why does it matter for Indian astrophotography?
Pixel scale (arcseconds per pixel) describes how much sky each pixel in your image covers. It determines how well your setup matches the atmospheric seeing at your site. Indian city seeing (2–4") is best matched by pixel scales of 1–2"/pixel. Too small a pixel scale (oversampling) wastes resolution on blurry seeing. Too large (undersampling) misses fine detail. The Player One Uranus-C with any Askar astrograph typically falls in the ideal range for Indian conditions.
Find the perfect camera + astrograph pairing at EDISLA
Player One · ZWO · Askar · Free pairing advice via WhatsApp
