T70 - Samyang 135 mm @F3.5, ZWO ASI2600MM Camera, LRGB, Ha, OIII, SII Filters , Lodestar SX2
 guider with ZWO 30 f/4 guidescope. Paramount ME Mount

Location Information

:Deep Sky Chile at Rio Hurtado Valley, Chile - MPC TX07

Telescope:  T70 135 mm f/3.5 Samyang Lens + CMOS

Timezone:  UTC -4:00 Santiago, Chile

Daylight savings time is observed 

Minimum Target Elevation: Approx 0° - 23°

South 30°31'34.712"  West 70°51'11.865"   

Elevation: 1710m  MPC X07 

Operational Notes

Super-Wide Field astrophotography. LRGB, Ha, OIII, SII filters.

Raw data can be found at data.itelescope.net.

  • Maximum Exposure 300 seconds.
  • Bin 1, Bin 2
  • calibrated darks available for 300 sec
    (the ASI2600MM has very little dark current making dark calibration frames virtually redundant)
  • residual coma in the extreme corners can be seen


Instrument Package

CMOS: https://astronomy-imaging-camera.com/product/asi2600mm-pro-mono/ 1

6-Bit CMOS

A/D Gain:  0.75e-/ADU

Pixel Size:  3.76um Square

Resolution:   5.81 arc-secs/pixel

Sensor: CMOS IMX571

Cooling:  -10C

Normal Array: 6248 (H) × 4176 (V) = 26 Mp

Filters:  Astrodon Gen 2 E-Series LRGB, Ha, OIII, SII

FOV9.97 Deg x 6.66 Deg

Pixel scale:5.81 arcsec/pixel
Orientation:Up is 275.9 degrees E of N


Telescope Optics

OTA: Samyang 135 mm @ F3.5

Optical Design: Camera lens


Aperture: approx. 65mm

Focal Length: 129mm (actual)

F/Ratio: F3.5 (stopped down from F/2)

Guiding: ZWO 30 F/4 guidescope with Loadstar SX2 

Mount: Paramount ME