When You buy a Diagonal, Will You Consider These?

When choosing a good  diagonal, here are some more detailed features to consider:

Optical System:

Lens quality：

Lens needs to have high-quality glass, while mirrors require smooth reflective surfaces. The quality of these optical elements directly affects image clarity and brightness

Optical coatings: High-quality optical coatings can reduce reflection and scattering, improve light transmission, and enhance contrast and image clarity.

Optical aperture: 
A larger optical aperture provides more light-gathering capability, resulting in brighter and more detailed images.

Magnification range: 
Some diagonals come with variable-magnification eyepieces, allowing adjustments according to observation requirements.

Design and Stability:

Architecture and stability: 
Diagonals should have a sturdy structure and stable platform to prevent vibrations and disturbances during observations.

Adjustability and convenience:
Some diagonals can be adjusted for height, tilt angle, etc. To accommodate the observer's height and preferred observation position.

Ease of operation:

The control and focusing systems of the diagonals should be user-friendly, allowing observers to quickly and accurately locate targets.

Comfort:

Eyepieces and field of view:   
Diagonals should be equipped with comfortable eyepieces and adjustable eye relief to accommodate the visual needs of different observers.

Observation position: 
The design of the diagonals should consider a comfortable observation position, avoiding discomfort from excessive bending or tilting of the head.

Materials and protection: 
Diagonals should be made of durable materials and have features like waterproofing dust resistance, and corrosion resistance to withstand outdoor conditions.