‘World’s sharpest’ 250mm lens now on Kickstarter with swappable lens mount
Taiwanese lens manufacturer William Optics is proposing to make a flatfield Petzval lens aimed at star gazers and photographers that it claims is the world’s sharpest 250mm.
Originally conceived as a compact and lightweight telescope for astrophotographers, the Redcat 250mm F4.9 uses a pair of synthetic fluorite elements to correct the usual field curvature of the Pretzval design to produce a sharp image right across the frame, according to the company. It is also claimed the lens is corrected to apochromatic standards.
A manual focus lens with a single aperture setting, the Redcat 250mm F4.9 is being promoted for normal subjects as well as for astrophotography on its Kickstarter campaign page. Those using it at night might not get to appreciate its startling red finish, but daylight photographers shooting wildlife could feel a little conspicuous.
Designed with a 44mm covering circle the lens is good for full frame cameras, and comes with an interchangeable T-mount system that allows options for Canon EF, Nikon F and Sony E cameras, with Micro Four Thirds and Pentax K to follow shortly. The lens weighs 1.47kg / 3.24lbs, measures 225mm x 80mm, and features a field rotation function for turning the camera on the mount, with markings for every degree. A reversible mount on the tripod foot has fittings for Arca-Swiss and Vixen style heads, and the lens comes with what is described as a ‘patented’ Bahtinov Mask for astro-focusing.
|Sample shot with the Redcat 250mm f/4.9|
At the time of writing the funding campaign had raised over $47,000 – well beyond the goal of $30,000. With most of the discounted deals gone, the lens can be had for $648, which the company says represents 93% of the full retail price. Visit the Redcat 250mm f/4.9 campaign page for more information, or the William Optics website.
Disclaimer: Remember to do your research with any crowdfunding project. DPReview does its best to share only the projects that look legitimate and come from reliable creators, but as with any crowdfunded campaign, there's always the risk of the product or service never coming to fruition.
|Old And Kind by poppyjk|
|Zombie Dawn Approaches by cjf2|
from Zombies Don't Surf
|Red Eyed Tree Frog by Tallgrass|
from Flash Photography
The design of the Fujifilm X-Pro3 encourages you to use it more like a classic film camera than a modern digital camera. So, does it work? Take a closer look in our hands-on slideshow.
We took a preproduction Fujifilm X-Pro3 to northern California to see what it's like to use. Turns out, it's okay to dislike the X-Pro3's new hidden LCD - that just means it's not for you.
Some might argue that Fujifilm's new X-Pro3 rangefinder-style camera takes a page from the Leica playbook, omitting a full-time rear screen in favor of a more 'pure' shooting experience. Is the X-Pro3 a carbon-coated classic or a titanium trinket? Chris and Jordan aim to find out.
We got our hands on a pre-production Fujifilm X-Pro3. Here's our initial gallery, including samples of the new 'Classic Neg.' film simulation.
The Fujifilm X-Pro3 is here, with an updated sensor, processor and autofocus system in tow. The company has also 'hidden' the LCD in such a way that you're more inclined to shoot through the hybrid viewfinder, for a more traditional photographic experience.
Tamron is developing a fast, compact 70-180mm F2.8 tele-zoom for full-frame Sony mirrorless cameras. The lens will weigh just 815g (1.8 lbs) and will offer a linear focus motor, weather-sealing and a short minimum focusing distance.
Tamron has announced three compact F2.8 macro lenses for full-frame Sony mirrorless cameras. Buyers can choose between 20, 24 and 35mm flavors, all of which are the same size, have a 0.5x magnification and use 67mm filters.
The new 512GB drives are smaller than a deck of cards and have read/write speeds of 1055MBps and 900MBps, respectively.
Both features have been discovered in the app code by a reverse engineer and activated manually.
The sensor will work alongside a dedicated camera module to open up new possibilities in the world of medical imaging.
After an unsuccessful attempt with the Drone Federalist Act of 2017, Senator Mike Lee of Utah is attempting to pass the Drone Integration and Zoning Act of 2019.
This gallery contains additional sample images from the new Olympus E-M5 III, captured while shooting our hands-on preview of the camera for DPReview TV.
Some of the Pixel 4's new camera features will be made available to older Pixel devices via a software update, but Google has confirmed Dual Exposure Controls and Live HDR+ features are limited to Pixel 4 smartphones.
This lens marks the third in Irix's lineup of lenses designed specifically for shooting up to 8K video.
Lomography rarely disappoints with its collection of strange and quirky film cameras and the LomoMod No.1 is no different.
It's free for iPhone users, but Pixel 4 owners are no longer able to take advantage of uncompressed original photo storage without paying. Google claims it's working on a fix for the 'bug'.
The new full-manual Laowa 17mm F1.8 MFT weighs just 172g and is set to ship 'late October' for just $149.
Olympus just announced the E-M5 III, the newest in its E-M5 line of enthusiast Micro Four Thirds cameras. In this hands-on preview, Chris and Jordan ask, "Who's it for?"
It's smaller and less costly than the flagship RF 28-70mm F2, but the RF 24-70mm F2.8L IS USM will appeal to many EOS R-series photographers with its handy range, fast, constant aperture, image stabilization and weather-sealing.
Previously, images were limited to being displayed at 2048px on the longest side. Now, images are shown at up to 6144px on the longest side.
Despite all of their incredible advantages, there are some situations in which a drone simply can't get the job done. Here are the limitations to consider if you're thinking about getting into drone photography.
Ricoh teamed up with the Japan Aerospace Exploration Agency (JAXA) to develop a specialized Theta camera capable of withstanding the harsh conditions of space. The resulting images and videos have now been published.
Comparing these three compact camera lenses head-to-head-to-head reveals the Sony to be more consistently sharp – at the cost of a lot of aperture offered by the Canons.
The small camera uses microbial fuel cells to power the camera, which in turn keeps an eye on the plants and animals around it.
Luna Display comes in the shape of a hardware dongle and a Mac app and is compatible with older macOS versions.
The CS2740 monitor is a successor to Eizo's ColorEdge CS2730 that increases the resolution, adds new connectivity options and now offers 10-bit input. Pricing information isn't yet available, but Eizo says it will officially launch on October 24.
ON1 software has today released the latest version of its Raw processing and image editing and organization application Photo RAW.
The Natural History Museum has announced the winners of its 55th annual Wildlife Photographer of the Year competition.
According to a report from Bloomberg, beta testers of Adobe's Photoshop CC for iPad have noticed a number of major features missing or incomplete.