A potelyt.com – Photography & Imaging Resources

About this site

APOTELYT.COM is an independent web-resource site that provides information on the features and quality of photographic cameras, lenses and accessories to internet readers free of charge. The website started out in 2011 as an information source on Leica's APO-Telyt range of telephoto lenses, but has over time grown well beyond this initial focus. It now features a variety of articles, reviews and information on new and not-quite-as-new photo gear.

Meet the editor

The website is a part-time project that has been initiated and managed by me, Peter Walkenhorst. My home base is Germany, but I have lived and worked over extended periods of time in France, Poland, Tunisia, and the United States. By training and profession, I am an economist and this background of regularly working with quantitative data, assessing trade-offs, and making choices has had an undeniable impact on the concept and design of this website.

APO-Telyt in action

Ever since high school, I have been a keen amateur-photographer with a strong interest in the technical side of this pastime. I have used cameras and accessories from pretty much all the major brands over time, and hope that competition will continue to foster innovation and provide us with better and more capable photo gear. One of the main objectives of the website, in this context, is to facilitate comparisons that make it possible to assess the features, strengths and limitations of different imaging tools, and thereby to enable better purchasing decisions.

Another aim that has motivated the site's development is to keep legacy gear, such as Leica's APO-Telyt line of telephoto lenses, in focus. I have been a keen user of ebay and have generally had very good experiences of acquiring pre-owned equipment on the auction site. Photography is an expensive hobby and older cameras and lenses can often function almost as well as the newest gadgets, while being much more accessible. Moreover, working with older, less advanced or refined imaging tools might actually enhance the photographic experience in some situations, by requiring the photographer to more carefully assess and plan a particular shot.



The website is written in validated HTML5, uses responsive design techniques, and is delivered over an encrypted https-connection. Some functionality is enhanced through the use of Javascript in your browser. Overall, the technology behind these pages is in line with current internet practices, so that the site should work correctly in all modern browsers. It displays best on screens with a width of 1080 pixels or more, while netbooks, tablets, and smartphones have access to a streamlined layout.

You might want to take a moment to consult the terms of use and the privacy policy in order to familiarize yourself with the legal framework governing this site. In summary, the content of the site is protected by international copyright law and may not be copied or distributed without prior consent of the website owner. Reasonable technical and organisational precautions will be taken to prevent the loss, misuse or alteration of any personal information, such as your name and email address that you might provide during your visit through comments or email feedback. Some non-personal information, such as your IP address and referral page, might be used to enhance your browsing experience on the site, but you can avoid that a cookie is stored on your computer by adjusting your browser preferences accordingly.

The operating expenses of the site are covered through on-site advertising and affiliate income. In particular, as a member of the Amazon Associate Program and the Ebay Partner Network, qualifying purchases on the sites of these online vendors after visiting apotelyt.com will result in the payment of an affiliate commission (without you as the website visitor paying anything extra).

The site may also use some third-party plug-ins, such as social network interfaces (Facebook, Twitter), web traffic monitoring tools (Google Analytics), and advertising modules (Google AdSense), which might store information temporarily on your computer to enable and enhance their respective functionality. You can avoid this practice by, respectively, logging out of your social network accounts, adjusting the cookie preferences in your browser, or installing appropriate browser extensions.


Can we stay in touch? Sign up for the occasional Apotelyt newsletter with infos on the latest camera gear, photography tools, and other imaging tips. If you don't find it useful, you can unsubscribe at any time by using the corresponding link at the bottom of every email.

Yes, I'm in!

You can also get updates on developments on the site via social media. In particular, you can follow apotelyt.com on Facebook, Twitter, and YouTube.

Any feedback that you might be able to provide through comments, suggestions, or ideas would be very welcome. Please send your email to editor {at} apotelyt {dot} com. I will normally respond within the next 24 hours.

APO-Telyt-R 400mm/2.8: 10 elements in 8 groups