Name: Rokinon 8mm f/3.5 HD Fisheye Lens for Pentax K
Brand: Rokinon
SKU: RKHD8MP
Price: 249.00 USD
Availability: BackOrder
Rating: 4.4 (65 reviews)

Rokinon 8mm f/3.5 HD Fisheye Lens for Pentax K

Rokinon 8mm f/3.5 HD

Rokinon

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Generally ships in 7-14 days, subject to availability Estimated to Ship: 07/25/2025.

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Photography

Lenses

SLR Lenses

Rokinon SLR Lenses

Rokinon 8mm f/3.5 HD 

Explore the Rokinon 8mm f/3.5 HD Fisheye Lens for Pentax K. Manual focus, aspherical elements, and a 180° angle of view. Shop now!

Under the umbrella of high-quality photography equipment, the Rokinon 8mm f/3.5 HD Fisheye Lens for Pentax K stands out with its unique features. This lens offers a 180-degree view, providing a dramatic, exaggerated perspective when paired with an APS-C camera. Alternatively, when used with a full-frame digital camera or a 35mm film camera, it delivers a powerful circular image floating within the frame.The Rokinon 8mm lens is equipped with hybrid aspherical elements and a multi-layer coating. These features ensure the production of sharply defined images with minimal flare and ghosting, enhancing your photography experience. The lens's ability to focus as close as 12 inches (30.48 cm) from the subject makes it a versatile tool for capturing detailed and intimate shots.This particular model of the 8mm f/3.8 Fisheye lens comes with a removable lens hood. This addition aids in reducing glare and protecting the lens, but can also be removed to offer an increased and unobstructed angle of view. This feature is particularly beneficial when shooting with full-frame digital or 35mm cameras.Please note that when used with full-frame sensors, this lens produces a rounded image. This Rokinon 8mm f/3.5 HD Fisheye Lens for Pentax K is a perfect addition to your photography gear, whether you're a professional photographer or a passionate hobbyist.

This was a surprise gift for me at Christmas. It's kind of fun to play with. I took a few images of clouds right after sunrise this morning and got this shot. I am anxious to try it on stars some night. It also comes with a new padded lens pouch.

A fun fisheye lens

Works well with my D3300, but my wife had difficulty on her D3500 - the camera would not recognize the lens.  I was able to use in purely manual mode, but she wanted proper inter-operability.

Good for astro photography.

Rokinon 8mm Fisheye

This is a very fun lens to shoot with a very different perspective. It relatively easy lens to operate. A great lens just to have in the bag.

Fun Lens

I love the look of this lens on an APS-C Camera. I purchased the 12mm version for my full-frame camera.

Unbeatable at this price point.

One of the two lenses that's ALWAYS in my (APS-C) camera bag.

A respectable budget-value, compact, relatively sharp ultrawide rectilinear DX fisheye lens. Has significant and design-expected distortion which can be corrected to some extent with post-processing. Definitely a great value lens to have in your kit.

Budget compact, relatively sharp ultrawide rectilinear DX fisheye lens

Good product for what it does but not very sturdy. Focus ring feels very cheap.

You get what you pay for

Very fun lens to use!  Not too hard to manually focus since it’s so wide-angle.

Fun!

Sharp as a tack. Too much fun. Have used in on both my D500 and D850. Fills the sensor on the 500, but not the full frame 850. Can’t use the supplied lens shade on the full frame camera. A steal for the $$$$.

Fun with a Fish ??  Eye ??

Excellent value.  Nice lens to play around.  You have to use it to get used to it.  Took it out to the barn to get unusual pics of my goats.  Got a little to close and she licked the unprotected lens.  Cleaned up ok.  It's fun to see what you can do with it.  Nice addition to my lens collection.

Get one.  You will like it

Rokinon 8mm f/3.5 HD Fisheye.This lens was purchased to give me a wider view of coverage, for some of our cropped sensor cameras, but also to  shoot some artistic images with our full frame cameras.  The lens has a solid build, and for the size of the lens, it very good feel to it.  Attachment to the various camera bodies worked with no problems, and the aperture ring was very solid, reminding me of lenses before the day of digital.  Focus was smooth.  Keep in mind, that since it is an 8mm lens, your subject may appear sharp no matter where you focus, so my recommendation is to use live view to focus the image.Color and exposure seemed spot on with no real vignetting of the edges.  Image shapes seemed best at f5.6 - f8.The lens we purchased has a detachable hood, which is a great feature when shooting with a full frame camera.  You will not get a full 180? file, but it's pretty close with the hood removed.  The model with the mounted hood, does vignette most of the image when shooting with a full frame camera, so we chose the removable hood.The real only downside to this lens was the hood.  It seems a bit loose when installed on the lens, not having a very secure feel to it.  That is the only reason we did not give this 5 stars.As for price point, it's a great value!  Having been in the business as a professional since 1978, we never really had a need for a fisheye lens, so the price made this very attractive to purchase, figuring we will only use this on rare occasions when we need that super wide lens.All in all, we highly recommend this product.

we highly recommend this product

This lens is awesome for really nice photos that aren’t your normal straight forward shot.  I’ve used this for large groups near the river great views and even indoor shots.  I really like this lens

Fish lens is great!

I purchased this lens for fun and found it easy to start using right away. Set on f8 and infinity focus it is giving me sharp images. I’m looking forward to exploring creative uses of this lens.

Easy to use out of the box

Been around, and began when all was manual; though I never ventured into the realm of fisheyes, until now.  I was missing out!  This lens is a sharp, inexpensive, no frills way to stretch both your skills and creativity. No regrets.

bargain access to stretching my skills

This is my first Rokinon lens (I chose this lens over other brands because it was on sale) and thus far I am impressed. This definitely won't be my last Rokinon lens. I have used it for landscape, city shots and night photography. When photographing anything close you have to be careful that what you want clear is in focus because it is difficult to see in the viewfinder and if it is slightly off you can have a face out of focus and the shoulders in focus, etc. When shooting anything farther away the focus can be turned to infinity and all will be fine.

Great lens for night photography

My Rokinon 14mm, f/2.8 is one of my favorite lenses on a Canon 5DIII. I bought this 8mm to use on a Canon EOS M since it is an APS-C sensor, but the camera shutter will not release when mounting this lens using an adaptor. I returned it. It is probably a great lens, but not if you want to use it on a Canon EOS M.

Rokinon makes great quality lenses at great prices, but compatibility may be an issue

Well made and Sharp. I just set the focus at 1.5m at F8 and shoot away. Don't even need to look in the view finder.

Great Fisheye

Works great with my d3400.   Takes amazing photos.  Love it!

Great fish eye

Not what you'd expect for the price.  Very well constructed.  Very sharp.  AE works well with Nikon D5300.  Well worth it.

Great value!

I have in the past made full circle fisheye lenses, but they always where kludges. This lens works well and is nice an compact. If you use it in DX mode it is full frame, but if you make your camera remain in FX you get the fishes circular effect. While this isn't something you need al the time it is a very playful lens for a lot of scenes. Images will need a bit of work to remove the color fringing at the circumference of the image, where there is a blue color fringe between the image and the black un-exposed portion of the frame. I am always impressed with the build quality of the Rokinon lenses. For the price they are nicely constructed and function smoothly. The focus confirmation chip on the Nikon models work well and enhances the usability of these lenses.

A really fun lens for FX cameras

As someone who is a begginner to photography, I don't want to spend a ton of money on things I don't know how to use correctly yet. This was perfect, easy to use, and I got nice results. Very affordable for the newbie!

Great for a beginner

And it was so much cheaper than the Closest comparable Canon. but it was stolen, so now I'm looking for a replacement.

Like the rectilinear image it produces when used on a crop sensor camera...but the effect with full frame is really cool, if specialized

Really cool lens

I have been waiting to purchase this lens as I already have a 16mm Nikkor fisheye, however that will not work with an APS camera. In an effort to travel lighter, I have been using mostly APS and leaving D800 at home. After researching and not wanting to buy Nikkor or Sigma for $$$, I took a chance on this lens and it delivers. Really don't need auto focus for a fisheye. Love it. Small thing to consider, it does not focus as close as costlier lenses.

great, fun lens

I bought it for my 20 year old daughter for Christmas, since she is taking photography as one of her art classes.  after testing it out,  she likes it. Since she likes it, then I like it . she is very fussy with details and apparently this fit the details she was looking for.

Rokinon 8mm f/3.5 HD fisheye, manual Focus Lens with removeable Hood for Nikon

New to using the lens but it's exactly what I wanted. Thinking of lots of uses for it in future projects. 

I could not believe a lens in this price range could be so great. Yes it is all manual but on my 7D exposure is automatic or manual as I choose which is unique on Canon cameras.
What a find and buy.

Get one

I first ordered same brand but slight different model. It was a bit cheaper but it was so basic that it has a non removable hood and did not have a chip so it only worked on M and S modes, which was too limited for what I needed.
This has worked great so far. The lens has a good built quality and it is definitely worth to pay extra to have the removable hood and the chip to use all the camera modes.

Love it!

Been able to get some great shots up close of pets and large landscapes. Great value.

Great fun

I've been using this lens for a couple of weeks now. It's not for the faint of heart but if you like to experiment and understand the ramifications of using a fisheye lens, this is an inexpensive route to go.

The images my lens produces are very acceptable, especially if the lens is stopped down 2-3 stops. Depth of field makes spot-on focusing tricky but that's the nature of this lens.

All in all, I really like what this lens can do - especially at the price.

Rokinon 8mm f/3.5 HD Fisheye Lens for Pentax K

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