腹肌南波灣！用富士拍照吧 康泰時645 80mm f2鏡頭轉接富士gfx中畫幅表現如何呢？

Hey YouTube, today we're looking at a legendary lens in the medium format space, and that's the Contax 645 80mm F2. This is a lens with an amazing reputation, at least on its native 645 film body. So how does it stack up on the GFX platform and how about that 1990s autofocus? We're gonna find out today on Heritage Focus. When it was originally introduced in 1999, the Contax 645 system entered a medium format market that was already dominated by the likes of Mamiya and Pentax, who had their own respective 645 systems. In order for Contax to make a meaningful entry in this space, they knew that they had to have something really special to set themselves apart. And as it turned out, they would end up having two of those very special things. The first was their partnership with Zeiss. Zeiss optics were just as well regarded then as they are today, and the system immediately gained a lot of attention for that reason alone. But Contax had one more trick up their sleeve. Not only did they build the system with a partnership with Zeiss, but they did it by creating the world's first autofocus medium format SLR style system. All of the Contax 645 lenses, except for the 120 macro, are autofocus lenses. And thanks to the Fringer adapter, they can be used as autofocus lenses today on the GFX bodies. We'll take a look at what that autofocus performance looks like shortly. There was only one version of the lens ever sold, and as far as the lens design, it's a planar design consisting of 6 elements in 5 groups, and it has an 8 bladed aperture. As this is not a native Fuji GFX lens, we'll be using the Fringer Contax 645 to GFX adapter I mentioned before. This is version 2 of the adapter, which has additional support for phase detect autofocus capabilities of the GFX 100S sensor. The adapter is expensive, but it does retain exit information as well as autofocus capabilities. The lens is listed as 530 grams on the spec sheet, but my copy weighed 509 grams without the lens cover or the hood. The adapter weighs 290 grams. The combined weight is 799 grams or 1.76 pounds. This combination of lens and adapter is almost exactly the same weight as the Fuji GF 80mm F1.7, which weighs in at 795 grams. The aperture ranges from F2 to F22 in full stop increments. The aperture mechanism is electronically controlled, and while you can turn the ring at any time, the aperture itself will not adjust unless power is provided to the lens. The lens is an autofocus lens, and while the lens can be manually focused, it was clearly intended to be used with autofocus. The focus throw is rather long, and the motor doesn't ever fully disengage, and it makes for a jerky and awkward manual focus experience. The lens is not an internal focus design. It does change size by about an inch as the focus changes. The lens measures 2.65 inches or 67mm in length without the hood. The Fringer adapter adds 2 inches, so the fully adapted lens has a maximum length of 4.65 inches or 120mm. The lens accepts 72mm filters. The minimum focus distance of the lens is 27.6 inches or 70cm. This is what the fully adapted lens looks like on the Fuji GFX 50R camera. Finding a copy of the lens isn't terribly difficult, but you'll pay a premium for the legendary character that this lens provides. At the time of filming, KEH and Used Photo Pro were the only premium pre-owned lens dealers with availability. KEH had the best selection by far, with 6 copies ranging in price from $1745 to just under $3500 depending on condition. There is a good selection of the lens available on eBay. There were 26 copies available at the time of filming, ranging from just under $2000 to around $3700 USD. Now as part of a new feature for heritage focus and where it makes sense, I thought I'd provide a suggested target price for a good quality used copy of the lens that's being reviewed. This will change over time, but as of August 2023, a good target price for this lens in excellent condition would be close to $2300 USD. Please let me know if this is helpful at all in the comments and if I should continue providing these target prices. Let's take a look at some autofocus performance as well as some sample images and see how the lens performs on the Fuji GFX100S. Here's a recording of the autofocus speed on the GFX100S. Autofocus was in single point focus mode and I wasn't using any advanced capability like continuous autofocus. You'll see I try and provide a good range of focus distances to work through and the motors performed very well given they're 20 plus years of age. Focusing is noisy and a bit slow but I would put it on par with the slowest autofocus lenses in the GFX lineup. Another good comparison would be the autofocus performance of the Hasselblad X1D series of cameras and lenses if you happen to have used those. The autofocus is definitely usable and it's accurate once it lands in focus. Since the lens was designed for a larger film plane vignette is not much of a concern here, even wide open. Focus is stellar with this lens. Focus transitions are buttery smooth and there really is something special here with this lens that seems to be why it's so highly regarded. Out of focus specular highlights wide open are rendered very nicely. They are more circular towards the middle of the frame and show a bit of the cat's eye shape towards the edges. And they can get a bit soap bubbly at times depending on how busy your background is. But there really is something special about this lens as far as bokeh is concerned. Flare control on the lens is decent. It will flare in some extreme conditions but it's not a major concern, unlike chromatic aberration. Wide open this lens does need some correction in post for CA. You will notice plenty of purple and green fringing when shooting the wide open at f2. And you will need to keep an eye out for those high contrast edges if that kind of thing bothers you. Sharpness is a strength of the lens. Though one needs to stop down to f2.8 or beyond to get into what I'd call modern levels of sharpness. Don't get me wrong. The lens is sharp at f2. And the way it renders fine details gives it a very unique look similar to the modeler Leica M glass from back in the day. But if you were to compare the Fuji GF80 1.7 wide open with the Contax 80 wide open the Fuji would look razor sharp and it would make the Contax look soft. Though the Contax will provide a sense of character and rendition that the Fuji can't hope to achieve. The lens and its T-star coatings paired with the GFX 100 megapixel sensor result in a deep and contrasty and very rich color palette. The color rendition is slightly vintage resulting in some pastel colors at times that provide a very interesting rendering and stand as a nice contrast to the modern Fuji lens lineup. Now it's time for the HTSA. The HTSA is our patent pending heritage focus highly technical subjective analysis. This is where I assign quantitative values to specific lens characteristics based on solely my opinion and no scientific measurements whatsoever. When it comes to bokeh I rate it at a 10 out of 10. It's extremely impressive and reminds me very much of the modeler M glass before spherical elements enter onto the scene. Color is a strong suit though be prepared for slightly vintage rendering at times. 9 out of 10. When it comes to character this is where the lens shines and why people pay big bucks for the lens even 20 years after it was released. 10 out of 10. Flare control is decent but chromatic aberration is heavily present. 3 out of 10. Size is great given the 645 format and the adapter. It's smaller in diameter than the native GFX 80 and much easier to hold. 8 out of 10. Weight is equal to the native GFX 80mm lens nothing more to say on that. 5 out of 10. Price is another weakness of the lens. Depending on what you value you can certainly get what you pay for in the image quality department but the native 80mm Fuji gets you a faster more silent autofocus and a sharper more modern optical performance. 5 out of 10. That's it for the Contax 645 80mm F2 on the GFX 100S. If you enjoyed the content and found it useful please do the thing and that other thing. Thank you again for watching Heritage Focus. Remember that you can always download the full resolution samples of the images shared today at heritagefocus.org.