TOP CORNER SMALL MIRRORS NO FRAME 1.45
DOWNLOAD > https://tlniurl.com/2tCJ74
Features & Compatibility- This mod moves the virtual mirrors towards the upper corners and the size is smaller.- Press F2 to enable/disable virtual mirrors- Works with ETS2 1.38, 1.39, 1.40, 1.41, 1.42 versions
For example, while driving on rough surfaces, the application of short-stroke damper movement allows the main piston valve absorb the small vibrations for a comfortable ride. However during hard cornering both the main and second piston valves move that create a much larger damping force for better driving dynamics.
The most affordable CMOS astronomy cameras for EAA and lunar and planetary imaging have sensors on the small side. The Sony IMX224 sensor used in the ZWO ASI224MC camera, for example, has dimensions of 4.9mm X 3.7mm and an aspect ratio of 4:3. The IMX385 sensor in the ASI385MC camera is 7.3mm X 4.1mm with an aspect ratio of 16:9. Higher-end astronomy cameras use the larger APS-C sensors (22mm X 15mm) or full-frame sensors (36mm X 24mm) used in DSLR and mirrorless cameras. These larger sensors are ideal for high-resolution and wide-field astrophotography because of their size and large pixel count, but they tend to be slower to read and far more expensive. Figure 5 shows the sensor of the ASI294MC camera which has a sensor size of 19.1mm x 13.0mm and an aspect ratio of 3:2.
As described in more detail in a later section, the sensor size is directly related to the amount of sky that can be imaged with a telescope of a given focal length. Bigger sensors take in more sky and work better for imaging larger celestial objects such as the Orion or Lagoon Nebula. But such large fields of view are not necessarily a good thing when imaging small objects like galaxies or planetary nebulae, especially with smaller telescopes with shorter focal lengths. The largest APS-C (24mm x 16mm) and full-frame (36mm x 24mm) sensors in astronomy cameras with resolutions in excess of 20 megapixels are generally overkill for EAA and can actually hinder performance because it takes a relatively long time to read each high-resolution image. It also takes a lot of computer memory and hard-drive space to process and store these images.
You do not absolutely need a focal reducer to do EAA. With some telescopes such as small ED refractors with a focal ratio of f/6 or Newtonians with a focal ratio of f/4 to f/6, you can get by without a focal reducer. But with slower telescopes of f/7 to f/10, a focal reducer is essentially a must-have. Snapping an image of an extended object like a nebula or galaxy with an f/10 Schmidt-Cassegrain telescope takes four times longer than if the same telescope is matched with a focal reducer that makes the effective focal ratio f/5. The difference between a 10s subframe and a 40s subframe in this example is not only a matter of getting an image four times faster. It also makes it less likely your mount will cause a tracking error during each subframe.
Hyperstar. A unique and expensive option (about $1,000), the Hyperstar device from Starizona replaces the corrector lens of compatible Celestron Schmidt-Cassegrain and EdgeHD scopes to achieve a focal ratio of f/2. The camera mounts in the Hyperstar optic and sits at the top of the telescope in front of the corrector plate; no light is directed out of the back of the scope. These are great for EAA because the f/2 focal ratio means very fast image capture, but they often result in very wide fields of view that are not suitable to frame smaller objects with large-sensor cameras. They can be a great complement to other focal reducers.
How would a small nebula like, say, the Trifid Nebula (M20) appear in these cameras and this telescope Figure 18 shows the results of the FOV calculator in Astronomy Tools. With the smaller ASI385MC sensor, M20 frames nicely in the field of view with plenty of space around it. In the much larger ASI294MC, the nebula appears relatively tiny in the larger frame, but the field of view is large enough that, with a nudge of the telescope to the south, the nearby Lagoon Nebula (M8) would fit in the same frame, making for a compelling scene. Of course, much smaller objects like galaxies and planetary nebulae would be dwarfed by the large field of view of the ASI294MC, although there is a provision in software to get an image from a smaller part of the sensor with this camera and other cameras with larger sensors.
With the smaller ASI385MC sensor, M82 frames nicely in the field of view with plenty of space around it. In the much larger ASI294MC, again, the galaxy appears relatively tiny in the larger frame, but the field of view is large enough that, with a nudge of the telescope and perhaps by rotating the camera, the nearby spiral galaxy M81 would fit in the same frame, making for a very good view.
It's worth experimenting with a number of cameras and telescope combinations with well-known objects of various classes including planetary nebulae, galaxies, globular clusters, and open star clusters. Many planetaries are quite small and favor longer focal lengths and smaller cameras. Many open star clusters are much larger and favor larger sensors and shorter focal lengths. As with visual observing, there's isn't a single telescope/camera combination that works well to frame all celestial objects. 781b155fdc