A 35mm SLR (single lens reflex) camerasingle lens reflex) cameraA single-lens reflex camera (SLR) is a camera that typically uses a mirror and prism system (hence “reflex” from the mirror’s reflection) that permits the photographer to view through the lens … Continue reading →

Stage is where the specimen to be viewed is placed. A mechanical stage is used when working at higher magnifications where delicate movements of the specimen slide are required. Where is the specimen placed on a microscope? Stage – This … Continue reading →

Advantages: Contacts conform to the curvature of the eye, provide a wider field of view, and cause fewer vision distortions and obstructions than eyeglasses. Contact lenses don’t get in the way when playing sports and exercising. Contacts typically aren’t affected … Continue reading →

Remove the cover of the DVR by removing screws. Connect the power and data cable from DVR/NVR to hard disk. Close and secure the DVR case. Connect the DVR to a power socket and then turn on the DVR. What … Continue reading →

The quality of a lens or camera has almost nothing do with the quality of images it can be used to produce. You probably already have all the equipment you need, if you’d just learn to make the best of … Continue reading →

Print Technology Display Permanence (Glass Protected) Digital Silver Halide 17-40 years, dependingon brand Ink Jet 100+ years for some branded ink/papers; but less than 5 years for other combinations Dye Sublimation 4-8 years lightfastness (one brand: 26 years) Will digital … Continue reading →

How to change your public IP address Connect to a VPN to change your IP address. Use a proxy to change your IP address. Use Tor to change your IP address for free. Change IP addresses by unplugging your modem. … Continue reading →

It is useful to know how close your lens can be to the subject and still focus. Different lenses have different minimum focus distances. The minimum focus distance of an AF-S DX NIKKOR 18–55 mm f/3.5–5.6G VR lens is 0.28 … Continue reading →

Dome, turret, and fisheye cameras use prime lenses with a fixed focal length, so they can’t change their field of view except through digital zoom. Their aperture is most often set as small as possible (meaning a large f-stop number), … Continue reading →

Connect iPhone and your computer with a cable. In the iTunes app on your PC, click the iPhone button near the top left of the iTunes window. Select the type of content you want to sync (for example, Movies or … Continue reading →

30 to 90 days. Most security camera footage is stored for 30 to 90 days. This is true for hotels, retail stores, supermarkets, and even construction companies. How long do security cameras retain footage? 30 to 90 daysThe answer is … Continue reading →

The Canon EF-M lens mount, introduced in 2012, is a derivative of the Canon EF lens mount designed for use with the Canon EOS M mirrorless interchangeable-lens camera. The EF-M lens mount is one of Canon’s two new systems for … Continue reading →

Canon R has a 30.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features DIGIC 8 processor. On the other hand, Canon M has a 18.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features … Continue reading →

Surveillance state Such widespread surveillance is usually justified as being necessary for national security, such as to prevent crime or acts of terrorism, but may also be used to stifle criticism of and opposition to the government. What is the … Continue reading →

Warning Signs That You Are Being Watched Others know your confidential business or professional trade secrets. Secret meetings and bids seem to be less than secret. You have noticed strange sounds or volume changes on your phone lines. You have … Continue reading →