Bulk Rock Tumbling Rough - Botswana Agate

Bulk Rock Tumbling Rough - Botswana AgateTumbling material from Botswana. Grey Base with white bands through out. Broken pieces. Sold by the pound. Specifications Rock Rough Botswana Agate Country of Origin Botswana Hardness (Mohs) 7 Average Rock Size N A

Many of images of planetary nebula and supernova remnants are taken only with H-alpha and OIII filters

axis 1: 1000 PE Cycle Error <±20" PE Cycle Time 432 seconds Slew speed (GOTO speed) Maximum slew speed: 4 deg/s default slew speed: 2 deg/s Note: switch to default or slower slew speed when carrying a heavy or bulky telescope Guide speed 2x

97") Angular Field of View: 6

Astronomy-Dedicated Strain Wave Gear

Similar materials used in China look and feel the same

We recommend our ASI1600/ASI174 mono camera for Ha solar imaging

The excellent performance would already justify its price if the FRA600 was a mere triplet APO refractor

If a tempered lens (eyepiece or lens) shows a strong green reflex when viewed from the front

the gaseous glow of the Orion Nebula

The QHY cooled camera has implemented the fully dew control solutions

Sharpstar Optics introduces Askar FRA500 astrograph

counterweight shaft