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Irix 15mm f2.4 Ultra Wide-Angle Lens for Nikon F Mount, Weather-Sealed

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https://www.youtube.com/watch?v=hzaBoZASJwk
Swiss design. Made in Korea. Used lens with two original caps, ILH-15A Hoos, Warranty Card, Irix Soft Case, Irix Metal Box, Irix Box.
https://irixlens.com/photo-lenses/15mm/
Fully tested in excellent condition.
S/n: last photo. Perfectly working order!

Irix 15mm f/2.4 Firefly Lens for Nikon
The Irix 15mm Firefly is a manual, super-wide-angle lens that allows you to include much more of the scene for a greater sense of space and incredible effects. It's the perfect lens for landscape, architectural and even interior photography. This versatile lens will adapt to every situation and the results are impressive, to say the least.

Ergonomic focusing ring which incorporates a convenient click-stop for the infinity setting
The built-in hyperfocal distance scale gives you precise information about the depth of field for each shot
An innovative focus lock lets you easily set the focus anywhere on the scale and keep it there for consistently repeatable results and to help avoid focus drift
With a minimum focusing distance of 11.02" (0.28m), you can get in close to your subjects for great wide-angle effects
Neutrino coating for minimal ghosting, chromatic aberration and flare, with maximum sharpness and contrast
15 elements in 11 groups for extremely high image quality
Focus lock allowing you to lock the chosen setting at any time
Weather sealed construction resists the elements for use in the harshest conditions
Hyperfocal distance scale for precise information about depth of field
Clearly-labeled infinity position for the focus ring with a noticeable "click" to make it easy to find, even in the dark
Minimum focus distance of 11.02" (0.28m)
Ergonomic focus ring for faster focus
9 rounded diaphragm blades for a beautiful bokeh effect

Irix has created the Firefly lens with a weather-resistant exterior and inner seals, so you can use it in all weather conditions. Thanks to this construction, your Firefly lens is protected from accidental water splashes, rain, snow, dust and other airborne particles. This makes it the perfect glass for photographers who need to work in all possible conditions.


Perfect for night photography

Night photography is not only interesting but also highly rewarding – it allows you to easily create eye-catching images, if you have the right lens. The Irix 15mm f/2.4 is an irreplaceable tool for any astrophotographer – its fast aperture of f/2.4, combined with a short focal length allows you to capture spectacular shots of the night sky and the Milky Way.

The night is yours!

https://www.youtube.com/watch?v=y7WlAe7-4KE

Intelligent Lens Design

The Irix 15mm f/2.4 lens has a module that allows you to control the lens’ iris directly from the camera, thanks to which popular semi-automatic modes (PASM) and data recording in EXIF format are available.

The use of electronics also enable the lens to be equipped with a focus confirmation system – the camera will announce the correct focus setting (either in the form of an icon in the viewfinder or with a sound), every time you set the focus correctly – it’s easy and convenient!

It’s worth noting that Irix lenses have the appropriate correction profiles that are pre-loaded and readable by software (such as Adobe Lightroom and Adobe Photoshop), that will make your shooting experience even more enjoyable.

A Build You Can Trust

It doesn’t matter if you’re traversing the hot sands of the Sahara or the frigid expanse of Antarctica – Irix lenses never back down from any challenge.
The sealing system has been designed to protect the inside of the lens from moisture, dust, and sand. Equally important, the lens does not change its dimensions during focus pulling, eliminating the risk of dirt particles getting swept into the internal structure. These properties not only allow you to work in demanding conditions, but also guarantee the cleanliness of the camera’s mirror chamber sensor.

https://www.youtube.com/watch?v=CCgg5tHNSeI

Optics that guarantee sharp images

Creativity, ideas, and effort put into a photograph would be nothing without the right lens. Thanks to many years of experience in optical design, Irix lenses are characterized by their excellent resolution and minimal distortion (2%) and almost no vignetting. The Irix 15mm f/2.4 lens consists of as many as 15 elements arranged in 11 groups: 4 refractive elements, 2 ED elements and 3 aspherical elements. The focusing distance is only 28cm which, in combination with the f/2.4 light and 9 rounded aperture blades, make the lens stand out with extremely smooth bokeh with an amazing perspective.

You compose the frame – we will take care of the rest!

Creative Tool

It doesn’t matter if you are a professional photographer looking for a lens for your next job, or an amateur looking to expand your focal range – the Irix 15mm f/2.4 is a right choice for every landscape photographer!

The Irix 15mm f/2.4 lens is an ultra wide-angle lens created for your full frame (35mm) camera, available in Nikon F, Canon EF, and Pentax K mounts.

This lens will allow you to open up to a completely new type of photography – thanks to the 110-degree field of view you will be able to capture eye-catching images, and the excellent optical properties will make the image sharp and full of details.

One Lens – Two Versions

The Irix 15mm f/2.4 comes in two verisons: Firefly and Blackstone.

Firefly – Lightweight composite construction, with an embossed rubber focus ring, allowing for smooth and precise focusing. Included with the lens is a soft pouch.

Additional Features

Click at infinity – enables precise, easy, and quick focusing. During focusing, you will feel the exact moment when your lens sets to infinity, which is extremely useful when shooting in difficult lighting conditions (i.e. at night).

Focus Lock – allows you to lock the focus ring in a specific position, which is extremely beneficial when you want to keep a specific focus plane i.e. in astrophotography, or when using the hyperfocal scale.

https://www.youtube.com/watch?v=OfG6jysEL-Q

95mm front filter thread – allows you to use screw-in filters such as Irix Edge UV & Protector, Irix Edge Circular Polarizer, Irix Edge ND, and Irix Edge Light Pollution filter and others.

Compatible with Irix Edge IFH-100 Filter Holder – allows you to expand your creativity thanks to Gradual Neutral Density filters with different gradients: Soft, Hard and Reverse

Rear Gel filter slot – allows the use of Neutral Grey filters mounted on the rear of the lens, which is a unique feature of the Irix 15mm f/2.4 and Irix 11mm f/4.0 lenses.

Circular Polariser Adjustment Window – the lens hood is equipped with a sliding window, allowing you to freely rotate the polarizing filter without the risk of getting dirty.

Focus Calibration window – due to the specifics of focus detection in DSLR cameras based on phase detection, it may sometimes happen that the lens needs to sync with the camera. Thanks to this special opening, you can easily calibrate the lens at home using basic tools within 5 minutes. Fast, simple and effective!

Compatible with filters

What makes the Irix 15mm f/2.4 lens unique is the possibility of using both classic 95mm screw-on filters, as well as square filters, thanks to the Irix Edge IFH-100 holder!
Every landscape photographer uses filters – they allow a creative approach to photography, which makes them extremely practical. The filters that you can use with the Irix 15mm f/2.4 lens are all 95mm filters, such as the Irix Edge:
UV & Protector – protects your lens against damage
Circular Polarizer – cuts off unwanted reflections and increase the clarity of the photo
Neutral Density – decrease the amount of light reaching the camera sensor, thus allows, for example, creatively to blurs the motion in your photographs.
Light Pollution – cuts off the light of cities, making your night photos full of detail without a yellowish haze

Irix Edge IFH-100 Filter Holder allows you to expand your camera’s capabilities thanks to Gradual Neutral Density filters with different gradients: Soft, Hard and Reverse. By cutting off part of the light from the brightest part of the image, you can shoot even in the most difficult lighting conditions.

This manual-focus Irix 15mm f/2.4 lens has superb optics, easily the equal or better than the larger, older and more expensive Zeiss 15mm f/2.8.

This is a full frame (FX) lens, and I'll be reviewing it as such.

It works great on DX cameras, too, on which you may make the usual inferences, but you're wasting most of this lens' performance shot on a small frame camera.

The Nikon version should work great with every FX digital Nikon.

It has a chip that should let it work in all metering modes and in all P, S, A, and M exposure modes, just like Nikon's AI-P manual-focus lenses.

Wow! Even shot wide-open at f/2.4, it's ultra sharp and contrasty at every focus distance.

This lens, like most major-brand lenses introduced since 2010, is ultra sharp.

It may be the sharpest fixed ultra-ultrawide lens I've ever tested. It's ultrasharp and contrasty and devoid of spherical aberration and lateral color throughout the whole image even wide-open at f/2.4. The only slight imperfection is that it is slightly softer in the last few millimeters of the full-frame corners at f/2.4, but even there it becomes ultrasharp as soon as stopped down a little.

It's so sharp and contrasty that it can incite aliasing on a 50 MP Canon 5DSR, even shot wide-open!

More good news is even though it has a rounded diaphragm, the Irix 15mm can make 18-pointed sunstars on brilliant points of light at the smaller apertures.

Overall
This Irix 15mm has optics as good or better optically than any of expensive lenses and takes normal filters, which most of the other lenses do not.

This is a great 15mm lens at a bargain price and much nicer than anything else I've ever seen out of Korea. If you're in the market for a fixed 15mm ultra ultrawide, this is probably your best buy.

kenrockwell.com

About us
Swiss precision and Korean ingenious solutions make a powerful mix. Irix lenses are designed to deliver top optical performance for Full Frame cameras. We offer large apertures whilst maintaining the best image quality. As photographers, we keep an eye on the details. It's not only the picture in front of us that is important, but also its surroundings. Whether it's shooting landscapes, news, sports or capturing architectural curves, we offer lenses that are solid, intuitive, accurate and handy.
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If you get the center in focus, the sides will probably be off, and if you get the sides in focus, the center will be off. This is more of a problem with wider lenses and at large apertures; stop a lens down and the sides will come into better focus. The A9 runs at its full 20 FPS with adapted manual-focus lenses. Metabones Mark V Adapter (you can buy in our shop) The Metabones Canon EF to Sony E-Mount Mark V Adapter is the best I've used. It works with every crazy Canon lens with which I tried it, and the results were usually much sharper than I expected. Silent shooting: no one asks why I'm taking pictures, period. Sensor-stabilization makes it easy to hand hold at 1/15. While LEICA lenses are the world's finest, they are not designed for the curved fields or rear nodal point positions optimized for the Sony cameras, and like all other adapted lenses, perform more poorly than Sony's own lenses because the sides and corners often aren't in proper focus. 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Not only does the combination of a LEICA (or other traditional Nikon or Canon) lens and Sony A9 sensor induce field curvature (there are a lot of optics and micro lenses on a sensor before you get to the light-sensitive part), it also induces astigmatism: the sagittal and meridional planes diverge. There's no need to splurge for the latest APO ASPH LEICA lenses since the LEICA's (or anyone else's) lenses, with their flat fields are never going to be that sharp across a frame that's expecting a curved field lens. Therefore, it's best to select the lightest-weight (older) lenses rather than the hottest new ones. The performance of my LEICA SUMMICRON-M 35mm f/2 (7-element) is the same as with the newest LEICA SUMMICRON-M 35mm f/1.4 ASPH (floating element), so I prefer to use the older, lighter lens. Here are two samples shot with the LEICA SUPER-ELMARIT-M 21mm f/3.4 ASPH at f/3.4 on the Sony A9. Click either to get the camera-original file and look at each at 100%: Summary Stick with lenses sold by Sony, be they branded Sony or Zeiss, for the best results as you expect. Sony's GM lenses are especially excellent in every way on the A9. Adapting lenses of other brands, even though these lenses may be state-of-the-art on those manufacturers' cameras, probably won't be that breathtaking on the A9 — or any other camera of a brand different than the lens' manufacturer. Stick to Sony G and GM lenses on the A9 and you won't go wrong. Auto ISO Upper and lower limits selectable from ISO 100 to ISO 204,800 in full stops (limited to ISO 102,400 for video and ISO 25,600 with silent electronic shutter). Slowest shutter speed settable in full stops from 1/16,000 to 30s in full stops, as well as an Auto setting that varies with the lens focal length. The Auto Slowest Shutter Speed setting my be varied ±2 stops slower or faster than the lens' focal length. Image Sizes Cropped Sizes The A9 automatically crops the full-frame down to APS-C if you mount an APS-C lens, or you can set this manually (MENU > Camera 1 > page 1/13 > APS-C/Super 35mm > ON), and either of these 1.5:1 formats may also be set to a 16:9 crop. On Left: Ethernet (WLAN for FTP connections). PC (Prontor-Compur) flash sync. On Right: 3.5mm microphone jack with plug-in power. 3.5mm headphone jack. Micro-D HDMI. The HDMI output supports 3,840 x 2,160 (25p), 1,920 x 1,080 (50p, 50i, 24p, 60p, 60i and 3,840 x 2,160 at 30p and 24p. YCbCr 4:2:2 8-bit and RGB 8-bit. Multi/Micro USB 2.0. On Top and Bottom: Hot shoe, which is also a Sony "Multi Interface" Shoe. Vertical Grip Connector (inside the battery chamber). WiFi IEEE 802.11 b/g/n Infrastructure mode 2.4 GHz. WEP, WPA-PSK and WPA2-PSK. Wi-Fi Protected Setup (WPS) or Manual setup. NFC NFC Forum Type 3 Tag compliant Bluetooth v4.1. 2.4 GHz. Model No. WW361847. Power & Battery Consumes about 4.1W (5.3W for video) using the finder and 3W (5.0W for movies) using the LCD. Sony NP-FZ100 rechargeable lithium ion battery included Magnesium alloy top cover, front cover, internal frame and rear cover. The grip area has been reinforced with magnesium alloy. Sony claims weather seals around most of the buttons and dials.

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