Mobile accessory review: Turtleback iPhone SLR Jacket
Turtleback SLR Jacket - compatible with Apple iPhone 4 and 4S, and Canon or Nikon lenses, $249
"Is it homemade or can you buy that?"
That was the very reasonable question posed to me by a passerby while I was shooting with my iPhone 4S plastered onto the camera end of a Canon EF 70-200mm lf/2.8 IS USM lens, via the iPhone SLR Jacket. The SLR Jacket is a veritable time machine that will take you back to a time when cameras were made of sturdy pieces of metal and photographers manually focused upside-down images on glass viewing screens.
The SLR Jacket, made by Turtleback and distributed under the name iPhone SLR Mount in the U.S. by Photojojo, is composed of three elements: a very solid aluminum iPhone 4/4S case with two built-in tripod mounts, a metal depth of field adapter tube and an adapter ring that allows you to mount a Canon or Nikon SLR lens. (An iPhone 5 version is currently available from the manufacturer, but no word yet on whether Photojojo will carry it.)
The DOF adapter is a metal tube with a simple lens on the end near the iPhone lens and a matte focusing screen in the middle. It’s the same kind of focusing screen as in an SLR viewfinder. The DOF adapter allows the iPhone lens to focus on the focusing screen, which is what you’re taking a picture of when you shoot with the SLR Jacket.
To assemble the SLR Jacket, you first slide your iPhone into the two-piece case and secure the two parts together by turning a large flathead screw, which you can do easily with a coin or thumbnail. Then you mount the DOF adapter on the case’s threaded 37mm ring, in front of the iPhone’s lens. After you’ve mounted the DOF adapter, you attach the lens adapter ring to that, then mount your SLR lens.
Putting it all together is pretty quick and straightforward, but there are a few details to attend to: You have to align the rectangular focusing screen with your image frame properly. Otherwise, its edges will show in the corners of your photos. You align it by opening up the DOF adapter and rotating the metal plate in which the screen is mounted. If only a slight adjustment is needed, loosening the adapter a little and jiggling it sometimes works.
Adjusting the screen with the adapter open requires some care. You should never touch the focusing screen itself, since its surface is very delicate. Residue from your fingers can damage it or leave smudges that are hard to remove. The focusing screen plate is not secured by anything when you open the DOF adapter up, so you have to be very careful not to drop it. Any dirt or dust on the focusing screen presents a problem, since its delicate surface is difficult to clean. During my testing I found myself wishing that there were an exterior ring that I could turn to align the focusing screen without opening the adapter.
The lens adapter ring requires the proper technique to loosen as well: Pull the adapter ring out and then turn it. If you try to rotate it before pulling it away from the lens, it won’t budge.
While the SLR Jacket seems at first glance to be a tool that will open up your mobile photography options by letting you use an interchangeable lens system, in fact, it imposes a number of limitations.
Because there is no mirror in the SLR Jacket to flip the image formed on the viewing screen by your lens, you’ll frame your shot upside down. The manufacturer makes a free Turtlehead camera app that will flip the viewfinder image for you, as will the $1.99 Almost DSLR app. If you want to use your favorite camera app, though, you’ll have to hone your upside down compositional skills or hold a hand mirror below your iPhone screen to see the viewfinder image right side up.
The Turtlehead app also has a calibration feature that focuses the iPhone’s lens on the focusing screen, to ensure that you capture the sharpest image possible. After you calibrate the focus, you focus your lens manually. You can also focus easily in other apps by first focusing the iPhone lens with your app and then focusing your lens manually. To control depth of field by adjusting the aperture, you'll need to mount an older, manual lens with a mechanical aperture control. Newer Nikon G lenses, and any Canon EF lenses (among others), won't give you that flexibility. An SLR lens adapter that converts a Canon or Nikon lens mount to another brand's lens mount would allow you to use the system with even more lenses.
Another limitation of this system is image quality. You can mount a $5,000 lens with the SLR Jacket, but you’ll still be taking a picture of a $100 focusing screen. And you'll have paid $249 for the priviledge. In my test images, the ridges on the surface of the focusing screen show faintly, and in some shots they actually create a noticeable moire pattern. It's no surprise that image sharpness isn't as good as you'd expect from the iPhone 4S without an adapter mounted, but dust is also a problem, since the focusing screen is exposed when you mount a lens. Whatever crud gets on the screen will show up clearly in your images.
The bottom line is that if you’re looking for creative options for your iPhone 4/4S and have a compatible lens collection, the SLR Jacket will give you some new tools to play with. And don’t forget that you can mount any filter or accessory lens with a 37mm thread on the case, not just the DOF adapter. However, if you’re hoping to make a leap in image quality or want to utilize the full depth of field control of recently made lenses, those are tricks this contraption won’t pull off.
What we like: Being able to play with a serious lens on a smartphone. This one-of-a-kind device is well made and versatile.
What we don't like: The delicate surface of the focusing screen is difficult to clean and keep that way, you'll frame your shot upside down unless you want to shoot with a specific app that will flip the viewfinder image, control over depth of field is limited when using newer lenses and at $249, this is one of the more expensive iPhone accessories we've seen. Moreover, image quality is nothing to write home about.
Aimee Baldridge is a writer and photographer based in New York. For more than a decade she has specialized in covering imaging technology, digital media, and the world of photography. You can see more of her work at www.aimeebaldridge.com
|walkersons fields by George Veltchev|
from -Waiting for Autumn- (in Full Colours Only)
|A smile is worth a thousand words by alberto_b|
from Fill the frame
The RF 24-105mm F4L IS USM is one of four lenses to launch with Canon's new full-frame mirrorless system, and it boasts the longest reach of the range. Take a look at some of the samples we've gathered thus far as our EOS R testing continues.
Nikon's Sendai factory in the Tōhoku region North of Japan has been churning out cameras and lenses since 1971. We had the opportunity recently to visit Sendai during events to mark the launch of Nikon's new Z mount.
There's no mistaking the Nikon Coolpix P1000 – with a 24-3000mm equivalent zoom, it really is in a class of its own. It's a conspicuous-looking superzoom with one main job: getting you really close to far away subjects. We've put together a gallery showing the kind of results you can expect from it.
A new report from The Verge claims Instagram is currently testing a feature that allows users to re-share posts to their own account feeds.
GoPro has announced its HERO7 camera lineup. The updated action cameras feature new HyperSmooth and TimeWarp modes, as well as improved video and photo specs.
The latest Samsung midrange smartphone offers a super-wide-angle lens in its triple-camera setup.
The Sony 24mm F1.4 is the latest lens to join the company's premium G Master lineup. We've been shooting with one for a couple of days - here's what you need to know.
Apple released iOS 12 a few days ago and some iPhone X users are less than happy with how the new operating system has made their phones look.
Camera bag manufacturer Lowepro has introduced mark II backpacks for its ProTactic AW range with models that are said to feature an improved handling experience as well as a collection of accessories that can be attached to the outside.
Canon has announced its latest superzoom camera, the PowerShot SX70 HS. Compared to the SX60 that came before it, the SX70 has the same lens but offers a higher resolution EVF, 4K video capture and support for Canon's new CR3 Raw format.
Cosina has announced its eighth lens designed specifically for Sony's E-mount system. The Voigtlander 21mm F3.5 lens is due out October 2018.
Sony has taken the wraps off of its new 24mm F1.4 GM full-frame lens, which the company claims is the lightest in its class. Despite its fast aperture, the 24mm F1.4 is remarkably light, weighing just 445 grams (15.7 ounces). The lens will set you back $1400 when it ships next month.
In this episode of DPReview TV we take a look at Sony's brand new 24mm F1.4 GM lens, a desirable focal length for many photographers. How does it perform? Chris and Jordan give us their first impressions.
We've had a little time to shoot with Sony's new wide/fast prime, both close to home and on the water in San Francisco. Check out our initial sample images.
Fujifilm released a firmware upgrade for its X-T3 mirrorless camera that addresses issues with distortion compensation and the mechanical lock on SD cards.
The app's algorithms have been trained using using 200 million cropping data points from real photographers.
Thanks to a software update, the Loupedeck+ editing console can now be used for video editing.
British photographic engineer MTF Services is claiming the world’s first third-party lens adapters for the new Nikon Z system with a collection of four units designed to allow cinema lenses to be mounted on the mirrorless full frame bodies.
Think Tank Photo has updated its line of heavy-duty rain covers and introduced a new, compact version for emergency situations.
The X-T3 is our first opportunity to analyze what's likely to be Fujifilm's next generation image sensor. Take a look at how it performs next to the competition in our studio test scene.
Canon's new normal is seriously sharp wide open. After shooting with it for a few days, we've prepared a gallery of real-world sample images.
Nikon will cease offering Brazil-based customer service and technical support, though the company stresses that it will still offer technical assistance and warranty repairs for valid warranties.
Two years ago, CatLABS of JP announced a plan to save Packfilm from the dead. Now, it's announced it's giving up its efforts to better focus its resources elsewhere.
The GoPro Fusion is designed to make it easy to capture 360-degree video and stills. We took it out recently on a typically hot Seattle summer day to see what it can do.
We've got our hands on a full-production Nikon Z7 camera and have updated our gallery with additional samples.
A new Kickstarter campaign seeks funding for Chroma Chrono, a programmable RGB camera flash that emits multiple colors during long exposures.
Think Tank Photo has launched a new lineup of six dual-access, water-resistant protective lens cases it calls Lens Case Duo.
Canon and Nikon finally entered the full-frame mirrorless market this summer with the brand-new RF and Z mounts. Now that we've had some time with the cameras, we wanted to revisit our earlier predictions and take stock.
The devices' camera specs look pretty much identical to last year's iPhone X but under the hood a number of important improvements have been made.
Blackmagic Design has announced the public beta of its new Blackmagic RAW video codec. The company says the new format combines the benefits of shooting Raw video with the ease of use and smaller file sizes usually associated with non-Raw video files.