國瑞綠能秉持「綠色能源」及「永續環保」,並將其列為企業核心價值。目前開發再生能源系統專案遍及全臺各地,範圍所及至偏鄉資源貧瘠的區域範圍,讓原本資源匱乏的地區,一樣能享有再生能源所創造出來的「綠色能源」及「永續環保」的環境。

 

canon 135mm f2 astrophotographycanon 135mm f2 astrophotography

canon 135mm f2 astrophotography canon 135mm f2 astrophotography

Film Friday: DPRTV reviews Fujifilm's Acros II film, Fujifilm launches Instax Mini 12 instant camera, DPReview March Madness, vote for your champions, Canon RF 16mm F2.8 STM sample gallery (DPReview TV), OM System M. Zuiko 90mm F3.5 Macro sample gallery, Live from Japan: Highlights from CP+ 2023, Retro Review: 24 years later, the Sony F505 is still pretty cool, Hands on with the OM System M. Zuiko 90mm F3.5 Macro, New FAA rules make it easier for recreational drone pilots to fly in restricted US airspaces, Leica marks James Bond's 60th* with a special edition D-Lux 7, Film Friday: A closer look at the Pentax KX, an original K-mount SLR, Blackmagic Design announces a new Studio Camera 6K Pro, National Geographic selects Pictures of the Year photo contest winner, Sigma brings DC DN APS-C primes to Nikon Z-mount, Panasonic Lumix S 14-28mm F4-5.6 Macro sample gallery, Tamron announces 11-20mm F2.8 ultra-wide zoom for Fujifilm X-mount, Film Friday: DPReview TV steps back in time to shoot APS film, Finer Points: Here's an easy way to improve video autofocus, DPReview TV: One simple fix to improve video autofocus, Head-to-head: Adobe Super Resolution vs. ON1 Resize AI vs. Topaz Labs Gigapixel AI, Waiting for the fishy in the little dishy by Gil Aegerter, Lava Lizard on Marine Iguana by ZimmWisdom. Yep the speed wars in the 70's that gave us all these bokeh monsters were all about the fact that its hard to get usable images in poor lighting when your film was stuck at iso 80 (or even 400 when you were pushing it). Some noteworthy targets to try. Backwards compatible (film). The logic of this article can be applied to a 200/2.8 as well. Any good ones apart from the Big Boys. The extent of this influence lies mainly in photographer's perception and creativity.As all arts photography may serve given needs due to numerous reasons with the resulting integrity of the work not necessarily suggesting art.The photographic gear (from lens cleaning tissues up to s/w) is just the tool(s) of a photographer in order to produce its work. Even if I wanted a 135mm lens (and the 70-200mm f/2.8 is more versatile) it would be the Nikon 135mm f/2 DC lens. It is good to know that the 200/4 SMC Takumar is good. Sharp without being harsh. Deep-sky astrophotography is often associated with a camera and telescope, but the truth is there are a lot of great camera lenses for astrophotography out there. You can go lower, but you have to watch your technique. Of course headline central sharpness is great, that is what grabs headlines, always shot at f2: any 135mm lens is going to give similar results. Add To Cart. Let's unbox, review and test this lens to find out why it is one of the best bang for your buck deals in astrophotography! I'll walk you through all this inc. Image quality is great, it is tack-sharp wide-open even though for partraiture, a little bit of softness is needed. This lens has a long focus adjustment ring, with great tension. Touching the telescope, even ever so slightly, will introduce vibrations which will ruin the photograph. It's not a bad lens, probably a great one, even if it doesn't seems really as sharp as a basic 85mm f/1.8 (used at f/2.8) , but it's a bad idea to work wide open if you don't need to. If they could make 135 f2 lighter version with AF for Sony and price is slightly under Sigma 135 /1.8 and obviously Batis 135 2.8 it could sell like hotcakes. You're right, but a headshot is exactly where I want to see all those megapixels I bought put to use! Rudy, why didn t you include any L lenses from canon? You currently have javascript disabled. In general, prime telephotos should outperform zooms. So I feel I'm being cheated. I rarely shoot static landscapes or posed, composed images. One very popular lens for bokeh fiends is the Canon 85mm F1.2it can produce extremely creamy out of focus backgrounds. 200mm Astrobin photos (not taken by me): https://www.astrobin.m USM F2.8 L II The lens is so crisp that the diaphragm blade pattern is visible on point light sources shot at large aperature. I hope that this post has provided some practical insight into a popular camera lens for astrophotography. Yes, it is about the same as 85mm f/1.4 blur factor is 60mm, while 135mm f/2 blur factor is 67mm. Please re-enable javascript to access full functionality. you can see here a lot of photos mostly shot with the f/4 version. The main problem with the old lenses is spherical aberration and colour error, especially pronounced on digital sensors. It's gross, all is a matter of balance and the perfect one, given you want sharp and fuzzy elements in your picture, is in the blend, and the way details seems to disappear gracefully (while keeping a level of readability). thanks for the write-up.. i just got this lens and have just been trying it out. Again, there's no context. But you just know that there is the professionalism that is lacking here -- and the writer's Instagram page confirms that. (purchased for $900), reviewed December 4th, 2006 The clip-in Astronomik 12nm Ha is one of their most popular filters ever and for good reason! If you have the 1.8 version, way to go. I agree to some extent with many of the critics of the article and disagree with much of its content, but I also have respect for the the author's right to express those opinions. Well saturated but neutral. To see even more example photos using the Rokinon 135mm lens (or Samyang branded version), go ahead a perform a search on Astrobin or Flickr, with the appropriate filter. I used Canon's 135 f/2 for ten years. The first telephoto lens of choice, especially recommended for beginners, is the 135mm F2.5 SMC Pentax. The EOS R6 II arrives in one of the most competitive parts of the market, facing off against some very capable competition. Well, for me. When I got home and loaded the photo into Lightroom I was blown away by two things. The Andromeda Galaxy using the Rokinon 135mm F/2.0 ED UMC lens. http://www.radiantlite.com/2009/01/canon-135mm-f2l-usm-mini-review.html . In this configuration, the lens is still a very fast F3.4. When I was on my way home after purchasing my first 135mm lens (the Samyang/Rokinon one) I took a few quick snapshots just to try out the lens. I would! Now I have only the Nikon but I can try to take a photo of the same subject fully open Whatever lens you pick in the end, you will make a great purchase. I like fast lenses, and my Nikkor 105DC is my favourite. This lens flares easily and the flare can be especially ugly if a sun or flash are in the frame. AHAB. I wanted to add my experience with some lenses that I thought worthy of being considered too, and some of the equipment that I have used. The full name of this lens is the Rokinon 135mm F/2 ED UMC, with ED standing for extra-low dispersion, and UMC referring to the ultra multi-coated optics. Stage photography is another good use for the 135 L. But, since fast 300mm ED lenses are beyond my toy budget, I would appreciate seeing magnified center and corner test images of actual star fields. Big F-value.Light. I know taste is subjective, but it seems to me that some people have become obsessed with blur and bokeh. A coupe of stage shows, one very recent, and a random collection using this lens exclusively I have found myself shooting wide open almost all the time. Great for portraits. My guidescope is a 5in F5 Jaeger's achromat with a 2.3x Barlow, and a 9mm illuminated reticle eyepiece. Rokinon 135mm F/2 Lens for ASTROPHOTOGRAPHY. best lens, blur, sharp-super, no CA, minimal shading. Stuff I used to take the photos. 135mm and 200mm lenses are suitable for wide angle star-field views, and comet and asteroid hunting, while 300mm lenses serve very well for the Andromeda galaxy, large emission nebulae, open clusters, and even larger globular clusters. The only reason i sell this lens is because of versatility. When all that was available were APS-C crop cameras a 85mm lens provided a near equivalent view angle to the 135mm on a full frame camera. Bond, I expect you to buy! Everyone assumes their definition is the "true" one. In 3 months I got loosy focus ring. These capable cameras should be solid and well-built, have both the speed and focus to capture fast action and offer professional-level image quality. My questions, for deep sky pics, should I get the 135mm lens or the RedCat 51 APO 250mm f/4.9 which you mentioned here as well? Proper composition, light and retouching are much prefferable to crazy gooey bokeh. But you are talking more than 2x crop (cut half by width and height) and that leaves you to twice smaller resolution == quarter of the Mpix count. (purchased for $890), reviewed July 17th, 2006 The only thing that could possibly make this better would be to add IS. This summer I'm going to try the lenses out for LRGB images to see how they perform. ", I'd no problem with that. Prime lenses are typically lighter as they do not need the additional glass and mechanics required to zoom at varying magnifications. At around $900 US very good price for quality no IS. The lenses I listed are certainly not the ONLY exceptional lenses made over the years. F2 allows higher shutter speeds in lower light without raising the ISO. My tests on it are described on http://pikespeakphoto.com/tests/canonlens135.html, i have never been a prime lens fan, just seems to leave you feeling trapped in a single dimension. It's a technical review about a couple of lens attributes. My Rokinon 135F2 on my crop body is fun to play with.. a budget lens with budget construction on a discontinued camera system.. but hey im just a ham and egger https://flic.kr/p/21nj82V, I had a Canon 135/2 for a while, but I decided I preferred the 100 L used not as a Macro but a normal lens (which my non-L USM 100 Macro was quite poor for). D8XX cameras, subject isolation and quality of bokeh.Zoom lenses can not hold a candle to such primes. The 50mm f/1.4 and f/1.2 is another story.While the 135mm f/2, in general, is a good lens, there are lots of lenses other than the 135 f/2 that will produce a very smoothly blurred background, including zoom lenses.It sounds like Micael is new to photography.Just my impression from this article. It could really use an update to its coatings. Defocus control enables the photographer to use an aperture of f/4 for the subject and to adjust the amount of background blur or the amount of foreground blur. Off topic, The focuser adjustment ring on the Rokinon 135mm F/2 is excellent, but fine-tuning your critical focus on a bright star at F/2 will take some trial and error to get right. "Bokeru" is a verb, and it can apply equally to to optical and psychological effects, including the reduced mental clarity that can some with age. For my purposes, this is a spectacular lens. My 24-70L needs to be stopped down to f5.6 to begin to match the sharpness of my 135L at f2.0 (the test shots were of the portrait of Andrew Jackson on a $20 bill). One very popular lens for bokeh fiends is the Canon 85mm F1.2it can produce extremely creamy out of focus backgrounds. The duck and cat are really the only good shots. Please send your photos of the Andromeda galaxy. Here are our top picks for the canon lenses for astrophotography. Now, I have to admit that up to this point, it sounds a little too good to be true. Amazing for portraits, easily fast enough for indoor sports. Ironically all the sample images in this post are painfully soft. Find out what happens when Chris shoots some very expired APS film using old Canon and Nikon cameras. Thats quite a jump from 135mm, so the camera body you use with this lens may change the types of targets you shoot. (purchased for $860), reviewed March 9th, 2017 I think they are an outstanding value for any wide-field astrophotographer, and are particularly suitable for newcomers. Andysea, those are great images on your website. Colour and contrast is great. I own Samyang 135 f2 for Nikon Mount and indeed it is incredible value lens. Otherwise this lens is absolutely incredible. I enjoied the use of this lens many years before the DSLR. When stopped down to 37mm, F5.4, it is almost identical to the Takumar except that on highly enlarged images it shows a hint of coma in the distant corners. After weeks with a production Fujifilm X-T5, Chris and Jordan have some final thoughts. Do I wish it were manufactured with metal? If experience has taught me anything, its that the practical, pain-free equipment that gets the most use under the stars. http://www.idyll.com/laney2014 We were surprised by just how much difference there was between these AI-powered image enlargers. Finally, to prevent image shift during exposure, all telephoto lenses must be supported at two points: at the camera end, and at the far end with a large retaining ring. Valerio, Electronically Assisted Astronomy (No Post-Processing), Community Forum Software by IP.BoardLicensed to: Cloudy Nights, DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging, This is not recommended for shared computers, Back to DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging, Buckeyestargazer 2022 in review and New Products. I really wanted to use, and like, a 135mm f2 lens so I bought the Canon version.

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