Help

Website structure

Our website is a catalog of photographic systems. A system is a collection of cameras, as well as lenses, flashes and other accessories designed for them. Each system or lens has its own page on our website. The "Systems" section contains systems sorted by the status of production. You can also select a system using the "Timeline" section - the systems are sorted there by the date of their introduction to the market. You can filter systems by format, camera type and other characteristics.

If search for lenses by systems does not suit you for some reason, you can always use the "Advanced search" section, which provides wider and more convenient options for finding lenses.

If you would like to to find suitable lenses for your camera by a particular genre of photography, use the "Genres" menu item.

Collections are also available - these are thematic lists of lenses based on some feature (for example, ultra-fast or anniversary lenses).

Finally, the website has a section with articles, as well as a small blog dedicated to the website itself.

As with any website, we have a search bar. However, the search is carried out only among lenses and only by their names, focal length and speed. Don't try to search for any phrases from lens descriptions - nothing will be found.

There are no separate pages dedicated to cameras on our website, but basic information about them can be obtained by clicking on the name of the camera on a system page, as well as on other pages where the list of cameras is given.

We do not maintain a catalog of flashes, bellows, extension rings, protective caps and other small accessories.

Lens lists

As you visit the website, you will have to deal with lists of lenses. Here is a short description of them.

Model history

In the "Model history" list, lenses are displayed in chronological order: the higher a lens is in the list, the later it was released. The lens you are at is highlighted in blue. For example:

Canon EF 50mm F/1.8 STMA6 - 50.35mE49 2015 
Canon EF 50mm F/1.8 IIA6 - 50.45mE52 1990 
Canon EF 50mm F/1.8A6 - 50.45mE52 1987 

Immediately after the column with the lens name, there is a column that indicates the type of diaphragm, then the optical formula (number of elements - number of groups), the closest focusing distance in meters, the type and size of filters, and, finally, the year when the lens was announced.

Diaphragm types:

MManualPPreset
SSemi-automaticAAutomatic
--Fixed

Filter types (where xx is a filter size):

ExxScrew-type(Exx)Rear screw-type
BxxBayonet-type(Bxx)Rear/internal bayonet-type
AxxClip-on(xx)Rear drop-in
SxxSeries(G)Rear gelatin
Built-inBuilt-in--Not available

Best-in-class lenses

The higher a lens is on this list, the better it is in its class.

Please note that the lens format (APS-C, 35mm full frame, medium format), the lens category, and the mount are taken into account when determining whether a lens is one of the best in its class.

In addition, if the same model is produced for several systems (this applies to Sigma, Tamron, Tokina lenses, as well as some others), then it can be one of the best in its class in one system (for example, Nikon F), but not in another (for example, Canon EOS).

A comparison feature is available for autofocus and current manual focus lenses: click on the "Compare" link and the website will display a list of advantages and disadvantages of a lens from the list compared to the lens you are at. The comparison is done automatically and based on the lens specification. Next to "Compare" are columns with the number of advantages (green) and disadvantages (red).

Best-in-class lenses are labeled "Best" on the system pages.

Lenses with similar focal length (range) and speed

Lenses in this list are always sorted by manufacturer name. Small-batch production lenses are displayed separately in the list. As with the best-in-class lenses, a comparison feature is available.

Miscellaneous conventions in lists

Production status:

Recently announced In production Discontinued

The ones that are highlighted in blue are the recommended lenses in the list of lenses with similar focal length (range) and speed, as well at the "Genres" page.

Tamron SP 45mm F/1.8 Di VC USD F013 2015 

Lenses from manufacturers who do not provide adequate quality control are crossed out. We do not recommend purchasing such lenses. However, they are recorded in the website database and you can get information about them in the same way as about any other lenses.

Samyang XP 14mm F/2.4 (Rokinon SP)Pro 2016 
Irix Blackstone / Firefly 15mm F/2.4Pro 2016 

The "Pro" mark indicates that the lens is a professional model.

Classes of lenses

When generating a list of the best-in-class lenses, the website's inference engine uses the following lens classification:

  • Fisheye primes
  • Fisheye zooms
  • Ultra-wide angle primes
  • Wide-angle primes
  • Slow standard primes
  • Fast standard primes (except for ultra-fast)
  • Ultra-fast standard primes
  • Slow short telephoto primes
  • Fast short telephoto primes (except for ultra-fast)
  • Ultra-fast short telephoto primes
  • Slow medium telephoto primes
  • Fast medium telephoto primes
  • Slow super telephoto primes
  • Fast super telephoto primes
  • Shift lenses
  • Wide-angle macro primes
  • Standard macro primes
  • Short telephoto macro primes
  • Medium telephoto macro primes
  • Macro zooms
  • Slow wide-angle zooms
  • Fast wide-angle zooms
  • Slow standard zooms
  • Fast standard zooms
  • Slow telephoto zooms
  • Fast telephoto zooms
  • Superzooms

Mirror/reflex lenses and lenses designed for use with bellows are excluded from the list as they are specialized lenses that cannot be compared to conventional lenses.

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