Hu, X., Wang, W., Hu, Q., Lei, X., Wei, Q., Liu, Y., Wang, J.: Design of CASSEGRAIN telescope baffles with honeycomb entrance. Chin. Opt. Lett. 12(7), 072901 (2014) Scaduto, L.C., Carvalho, E.G., Santos, L.F., Yasuoka, F.M., Stefani, M.A., Castro, J.C.: Baffle Design and Analysis of Stray-Light in Multispectral Camera of a Brazilian Satellite. Annals of Optics, XXIX ENFMC (2006) For example, there are often difficulties in older houses when it comes to the location of retrofitted windows. the draw tube is baffled and so is the telescope. In fact, both baffles appear to my untrained eye to be half the diameter of the tube. That is, the opening in the baffle is about half of the opening of the tube in which they are located. Would removing these baffles prove beneficial?

From the above comparison and contrast of the baffle trims and reflector trims, you can now find the ideal trim that will suit your space. Even though they are meant for enhancing the lighting illuminations, they suit different spaces. This is because the baffle trims are designed to dim the super bright lights to make them soft and friendly to the eyes. On the other hand, the reflector trims will increase the brightness of the lights by reflecting it further. Due to this difference in how they work, these trims are meant for different spaces. The reflector lights are needed in places where higher light intensity is needed like the kitchen and hallways. The baffle trims are applicable in spaces where low light is needed and rooms with the lower ceiling. Park, J.-O., Jang, W.-K., Kim, S.-H., Jang, H.-S., Lee, S.-H.: Optical noise removal in the focal plane of the Spaceborne camera. J Opt Soc Korea. 15(3), 278–282 (2011) Just returned from examining the baffles on my Jason Model 313, designed originally for 0.965" oculars. Just as Eric promised, at focus, one baffle in the focuser does indeed clip the full view of the objective. The baffle does not appear to be removable, but the focuser may need to be removed from the OTA to confirm that. Because the baffle is attached to the draw tube -- a part that moves -- the problem is worse with some oculars than others, depending upon the position of baffle when the particular ocular is focused. Both glass and polycarbonate are acceptable under Red Tractor standards, but the windows must be double-glazed and, if using glass, it must be toughened on the inside. Of my Plossls, the 40mm has this trouble the worst. As they get shorter, the problem improves rapidly. The issues with the 20mm and 15mm may even be unrelated, just the trouble of hovering the eye accurately above a small opening.

A good case in point to the original situation is my 6335 Sears. I t has the two piece drawtube with .965 EP's and though the scope worked great in its original configuration, I just knew that it could work better. In the long run I ended up making an adapter that did not alter the scope in any way yet it lets me now use a full array of 1.25" EP's and the increase in performance is amazing.

Kawano, H., Shimoji, H., Yoshikawa, S., Miyatake, K., Hama, K., Nakamura, S.: Optical testing of star sensor (I): defocus spot measuring technique for ground-based test. Opt. Rev. 15(2), 110–117 (2008) The same also applies to the reflector lights as they aid in improving the illumination though by increasing the brightness. It will improve the overall lighting system whenever high light intensity is needed in the room. This makes it great for rooms with higher ceiling boards and places like the kitchen that will require more light for better illumination. b. Conceals and Decorate the Recessed Lights

Mazy, E., Defise, J.-M., Plesseria, J., De Vos, L.: Optical Design of the INTEGRAL Optical Monitoring Camera. In: Proc. SPIE (1998) As it is obvious in Eq. ( 3), there must be a tradeoff between focal length and FOV. Increasing each one will decrease the other. When retrofitted windows have been poorly sealed there can be issues with draughts, which will compromise bird performance. As mentioned in section Optical system and image processing, the optical system must satisfy the following cases:

Gobo – Do you remember how you used to fold your fingers in front of a lamp to make the bunny shadow? That is the same principal as a gobo. A gobo is stencil or template, made of heat-resistant material like metal or glass, and arranged like a lens in front of a light source. The resulting effect of having a gobo in place shapes the light into a pattern for your viewing pleasure. Gobos can allow your light to project anything, from a basic outline to more complex images like a full color version of Earth. As can be seen from Fig. 5 the second lens and the third lens, as well as the fourth lens and the fifth lens are laminated in the initial structure. It is necessary to separate the second lens from the third lens and the fourth lens from the fifth lens to prevent degumming in space environment. Thus, the structure of the optical system needs to be optimized. Furthermore, the small volume and mass of star sensor can be reached by minimizing the radial and axial dimensions of the lenses. By considering optical parameters in Table 3, Double Gauss system is designed and optimized by ZEMAX optical design software. If you look at almost all of the new after market focusers, they either have no baffle at all or a minimal one at best. And in the ones that do not have one, they are usually threaded or grooved on the inside to reduce scatter. Boldrini, F., Monnini, E., Procopio, D.: Applications of APS detector to GNC sensors. Eur Space Agency-Publications-Esa Sp. 516, 33–40 (2003) The recessed lights are known for quality lighting and easy installation process. Besides this, the recessed lights are also widely applicable since they can be installed in different places like the bedroom, office, living room, dining room, kitchen, hallways, and other ideal places. This type of light is also easily dimmable from approximately 5% to 100%. This implies that depending on the intensity of light needed, you will always get it.

As for focusers, a lot of the old ones had these crazy small aperture baffles in them as do some of the newer inexpensive ones and these were created to be used with .965 EP's where you will have a field stop not much larger than 17-18mm. With the advent of larger format EP's and or the use of them in older scopes, it is almost imperative to alter the size of the opening or live with what you have.