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www.quora.com/Is-focal-length-the-same-as-working-distance

The working distance is the distance from the top of the specimen or the top of the coverslip, when the image is in focus. It is not the same as the focal length of the lens, although high magnification requires a small focal length of the objevtive lens, and this gives rise to a small working distance.

www.edmundoptics.com/resources/application-notes/imaging/...

When using Fixed Focal Length Lenses, there are three ways to change the field of view that the system (camera and lens). The first and often easiest option is to change the working distance from the lens to the object; moving the lens farther away from the object plane increases the field of view.

www.microscopyu.com/.../working-distance-and-parfocal-length

Working Distance and Parfocal Length Microscope objectives are generally designed with a short free working distance, which is defined as the distance from the front lens element of the objective to the closest surface of the coverslip when the specimen is in sharp focus.

www.the-digital-picture.com/Photography-Tips/How-to...

How to Calculate Lens Working Distance. By lens working distance, I am referring to the distance from the end of the lens (or the end of the lens hood if in place) to the subject. This is the amount of space you have to work in.

www.coinimaging.com/image_working_distance_vs_mag.html

Image/Working distance vs. magnification. back. Now that we have seen that image distance and object distance are closely tied to each other and the focal length, we can get into how these distances apply to real life. The image distance and the focal length are mathamatically related to the image magnification and working distance at the ...

www.science-bbs.com/157-optics/c80267b3ce03d6d3.htm

> In some lens catalogs, I find both the working distance > as well as the focal length stated. Is the focal length > for the first element in the objective? > If the working distance is the length between the object > and objective lens, then what is the focal length? > For long working distance objectives, the working distance

www.quora.com/Whats-the-difference-between-working...

What's the difference between working distance and effective focal length of a lens? Update Cancel. Answer Wiki. ... Is focal length the same as working distance? ... What is the relationship between the focal length, distance between the two positions of the lens and distance between the object and the imag...

www.photo.net/discuss/threads/working-distance-focal...

The farther you are away from the object the more flattened it will appear. The focal length of the lens controls how much the image of the object is enlarged on the film or sensor. For any given working distance the 90 mm enlarges more than the 60 mm but without changing the perspective.

www.cambridgeincolour.com/forums/thread2456.htm

Focal length is the length in mm between the front part of the lens and the sensor or film at the back of the camera that is required to get the image in focus. The longer the focal length then the further the light will have to travel between passing the front of the lens and hitting the sensor. This affects the field of view because it is ...

www.vision-doctor.com/en/optical-basics.html

The most important parameters for the calculation are the image field, sensor size, working distance and focal length of the optics. The first two values, however, are mostly defined by the application so that only the working distance for a particular focal length, or vice versa, must be calculated.