AstroPics

Astrophotography is a fascinating field that blends the love for astronomy with the art of photography. Central to capturing the night sky's splendor is the choice of your mount. A good mount not only stabilizes your imaging setup but also tracks celestial objects as they move across the sky, which is crucial for long exposure photography. Here’s how you can choose the best mount for your astrophotography adventures:

1. Understand the Types of Mounts

Alt-Azimuth Mounts: These are simpler, less expensive, and operate on two axes: altitude (up/down) and azimuth (left/right). They are great for visual observations and basic photography but require additional equipment like a wedge for serious astrophotography to track the stars accurately due to field rotation.

Equatorial Mounts: Designed specifically for tracking celestial bodies, these mounts align with the Earth's axis. They rotate around one axis (right ascension) to compensate for Earth's rotation, making them ideal for astrophotography as they naturally counteract field rotation over long exposures.

• German Equatorial Mounts (GEM): Traditional design, good for visual and imaging, but requires counterweights for balance
• Fork Mounts: Compact and often computer-controlled, suitable for both visual and photographic use.
• Single Arm Mounts: Less common, they provide a clear view of the meridian but might limit where you can position your equipment.

2. Consider Your Equipment Load

Payload Capacity: Every mount has a specified payload capacity. Ensure your mount can handle the weight of your telescope, camera, and any additional accessories like guidescopes or dew heaters. Overloading can lead to poor tracking and potential damage.

3. Think About Tracking Accuracy

Periodic Error Correction (PEC): Higher-end mounts offer PEC, which compensates for the periodic tracking errors due to mechanical imperfections in the gear train.

GoTo Capability: For ease of use, consider mounts with motorized GoTo systems that automatically locate and track celestial objects.

Autoguiding: Advanced mounts support autoguiding, where a secondary camera and telescope correct for drift during long exposures, enhancing image quality.

4. Portability vs. Stability

Portability: If you plan to travel with your setup, consider the weight and size of the mount. Some high-end models might be too cumbersome for frequent transport.

Stability: Larger, heavier mounts provide better stability, crucial for reducing vibrations from wind or handling, which can blur your images.

5. Budget

Entry-Level: Good for beginners or those with lighter setups. These mounts are usually less expensive but might lack advanced features like high precision tracking or autoguiding ports.

Mid-Range: Offers a balance between price and functionality, often suitable for hobbyists looking to step up their game.

High-End: Designed for serious astrophotographers. These mounts provide superior tracking, precision, and stability at a premium price.

6. Software and Upgradability

Many modern mounts come with or can be upgraded with software for enhanced functionality:

Polar Alignment: Software aids in accurate polar alignment, crucial for long exposures.

Firmware Updates: Check if the mount supports updates which can add features or improve performance over time.

7. Field Testing and Reviews

Before making a purchase, read reviews, watch tutorials, and if possible, test mounts at star parties or through astronomy clubs. Real-world feedback can be invaluable.

Conclusion

Choosing the right mount for astrophotography involves balancing several factors: the type of photography you wish to pursue, the weight of your equipment, your budget, and your need for portability. Each mount type has its advantages, and your decision should reflect both your current needs and future aspirations in astrophotography. Remember, your mount is the backbone of your setup, so invest wisely, considering both immediate usability and long-term growth in your hobby or profession. Happy stargazing and shooting!

John Ramdenee