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These photogrphic slides contain IR Photometer of Leh

These photographic slides contain the 6-inch telescope at Mount Nimmu top on an astronomical site survey at Leh-Ladakh during 1984-1989.

These Photographic slides contain compressed photographs of a 20-inch telescope building, dome, guest house, photometer, and Bhavnagar telescope at Leh.

These photographic slides contain compressed pictures of the set-up of the astronomical instruments like Hydrometer, wind instrument, etc. at the top of Mt. Nimmu.

These photographic slides contain pictures of sightseeing on the way to Leh from Delhi. It contains survey pictures of the West hill of Mt. Nimmu and the base camp of Mt. Nimmu, the Himalayan ranges, and the set-up on the East hill of Mt. Nimmu.

These photographic slides contain the images of the spectrometer, and Ondrej telescope related to the Optical Science Department of Royal Observatory, Edinburgh.

The album contains photos taken during the 25th anniversary of the Vainu Bappu Telescope (also called VBT, 2.34m telescope, and 90-inch telescope) installed at Kavalur observatory in 1986. Photos of the jubilee ceremony meeting, presenting a miniature form of the VBT to the persons who were working for VBT by M. G. K. Menon, publishing a book titled ' Vainu Bappu Telescope- Silver Jubilee 2011' by M. G. K. Menon and S. S. Hasan, a talk on the VBT inside the telescope building, exhibition on the theme of VBT in the library of Bangalore campus are organized.

This item was about the photograph of granite pillar in meteorology department compound at Nungampakkam, Chennai as seen today. In the compound of the Meteorology Department in Chennai, there is a 15-foot tall granite pillar weighing 10 tons. This granite pillar is part of the Regional Meteorological Centre in Chennai and is preserved as a monument. This is the place where Madras Observatory was existed.

The item is a 6 inch transit circle. The transit circle is an instrument used to determine the declination of stellar onjects. It consists of a circular scale kept perpendicular to the rotating axis of a telescope tube.

This item was a optical instrument named as Stereoscope. Stereoscopes are apparently those optical devices that help to view the two images separately and with relaxed eyes. There are two types of stereoscopes as: lens or pocket stereoscopes and mirror stereoscopes. Lens or pocket stereoscopes are great for viewing the whole overlap area of prints up to 9 cm × 13 cm or parts of larger patterns. On the other hand, mirror stereoscopes were designed to accept standard 23 cm × 23 cm metric air photos and work well with A4/US letter-sized prints. Most models come with magnifying options up to eight times, which is pretty impressive. One cool thing about mirror stereoscopes is that they are large enough to allow the analyst to draw beneath them, so it is possible to trace objects identified in the stereoview with a pen onto one of the images or a transparent overlay. However, it's important to remember that this sketch wouldn't have the geometric properties of a map as it contains all distortions present in the base image.