KatzEye™ Focusing Screen for thePentax® K-3, K-5, K-5II, K-7, K-30, K-50 & K-500
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The KatzEye™ focusing screen for the Pentax K-3, K-5, K-5II, K-7, K-30, K-50 and K-500 is a laser matte with a horizontal split prism circle and a microprism collar, very similar to the one you would find in many classic SLRs. The split prism with microprism ring is a great combination for focusing in a variety of situations. The screen will have NO effect on the functioning of the autofocus sensors of the camera and it is a direct replacement for the original.
Pentax K-3/K-5/K-5II/K-7/K-30/K-50/K-500 Viewfinder with Split Prism & Microprism Ring (Simulated)
The standard KatzEye™ screen for the Pentax K-3, K-5, K-5II, K-7, K-30, K-50 and K-500 does not have the focus area brackets marked like the original screen - we prefer the clean look on the screen. For those users that wish to have the focus area brackets marked, this available as an option. If you want the AF area markings, please be sure to select the focus area bracket pattern when adding the screen to your cart. The original spot metering arcs cannot be shown due to their coincidence with the prism, but they correspond roughly to the diameter of the central split prism. All other viewfinder information is unaffected by the installation of the KatzEye™ screen.
The KatzEye™ focusing screen for the Pentax K-3, K-5, K-5II, K-7, K-30, K-50 and K-500 shows only a very slight effect on light metering. In our testing, the KatzEye™ screen tested within factory tolerance in nearly all situations. The only exception is when using spot metering with lenses having apertures of f2.8 or smaller. This combination may produce overexposure, so it is advisable to use either center-weighted average metering or multi-segment metering to preserve accurate meter response when using small aperture lenses. In the event that spot metering mode must be used with a small aperture lens, it is advisable to set an appropriate exposure compensation by reading the histogram of a test shot. Approximate exposure compensation values are as follows*:
Note: These exposure compensation suggestions are a recommended starting point only and actual results may vary depending on conditions. Users are advised to take a test photo and check the histogram before beginning any critical work. Apertures indicated in the above chart are the lens maximum aperture as indicated on the lens body and are not affected by the actual aperture chosen for a given photo.
* Metering test results presented are based on testing of the K-7 model. While results are expected to be similar for the K-3, K-5, K-5II, K-30, K-50, and K-500, users of these models are strongly encouraged to take a test shot and check the histogram before beginning any critical shooting.
The KatzEye™ focusing screen for the Pentax K-3, K-5, K-5II, K-7, K-30, K-50 and K-500 is available exclusively in the KatzEye™ “Plus” version. The “Plus” version has a unique prism design which delays the prism ‘blackout’ phenomenon until well after f11. Ordinary split prisms will black out by about f5.6, rendering them difficult to use with slower zoom lenses, teleconverters, or in extreme macro photography... but not the KatzEye™ “Plus”. More information about the KatzEye™ “Plus” can be found here.
Since the Pentax K-3, K-5, K-5II, K-7, K-30, K-50 and K-500 were designed with user-changeable focusing screens, installation is very straightforward and a suitable installation tool will be included with your purchase. No modifications or calibration are required. The installation procedure is identical to the procedure to install the replacement screens sold by Pentax. You may use Pentax’s instructions if you have them available or you may use the KatzEye™ Optics instructions which are available here.
If you don’t feel confident installing the KatzEye™ screen, your local camera shop should be able do it for you. Since the KatzEye™ screen is a direct replacement for the original, any competent shop should be able to handle the installation and the original screen can be reinstalled at any time, should you so desire. If you want us to install it at KatzEye™ Optics, we would be more than happy to do so. Please see the Installation Service page to order installation with your focusing screen. Installation service at KatzEye™ Optics costs $65, plus the cost of return shipping of your camera.
Like all screens made by KatzEye™ Optics, the Pentax K-3, K-5, K-5II, K-7, K-30, K-50 and K-500 screens can be OptiBrite brightness enhanced for the ultimate appearance. In our testing, the OptiBrite treatment showed no effect on the light metering of the K-7 beyond that caused by the presence of the prism (see Metering Information section above). Click here for more information about the OptiBrite treatment.
In addition to the AF area brackets, the KatzEye™ focusing screen for the Pentax K-3, K-5, K-5II, K-7, K-30, K-50 and K-500 is available with optional guide patterns to aid in proper composition. We have a variety of standard patterns of grid lines and crop guides available or we can provide a custom pattern to your design. Click here for more information about our grid line and crop guide patterns. Please note, that if you choose the AF Area Brackets AND an additional composition aid pattern, the two will be combined in an aesthetically pleasing way and will appear different than the drawings shown.
All KatzEye™ focusing screens are custom made to order and are usually not available to ship the day the order is placed. As of 04/21/2014 production is running normally and most orders will be shipped in 4-6 business days from the date they were placed.