SAMYANG AF 35MM F/2.8 FE  Samyang AF 35mm f/2.8 FE tự tin là ống kính có khả năng lấy nét tự động cao, mang lại chất lượng hình ảnh tuyệt vời (Auto Focus – AF). Ống kính Samyang AF 35mm f/2.8 FE có tốc độ lấy nét nhanh và chính xác chưa từng có, độ nét tại khẩu lớn nhất 2.8 và độ méo ở tiêu cự 35mm là không gì có thể sánh bằng Ống kính Samyang AF 35mm f2.8 FE là một ống kính nhỏ gọn với hiệu năng mạnh mẽ, thích hợp cho việc chụp ảnh hằng ngày hay trong các chuyến du lịch. Ống kính chỉ có trọng lượng 85g kích thước 3.3cm. Nhờ tích hợp nhiều công nghệ quang học mới nhất của Samyang nên dù có kích thước nhỏ nhưng ống kính này vẫn cho ra những hình ảnh rực rỡ sắc nét. Cấu tạo quang học Bên trong Ống kính Samyang 35mm f2.8 FE được cấu tạo với 7 thấu kính chia làm 6 nhóm, có 2 thấu kính khuếch tán và 1 thấu kính khúc xạ UMC giảm hiện tượng quang sai và tán sắc, mang đến độ phân giải cao từ tâm đến góc ảnh, thêm vào đó lớp phủ Samyang UMC giúp giảm thiểu quang sai và phân tán ánh sáng Linh hoạt và tiện dụng Khả năng linh hoạt cùng hiệu năng mạnh mẽ, độ dài tiêu cự 35mm giúp ống kính Samyang AF 35mm f2.8 FE trở thành lựa chọn tuyệt vời nhất cho nhiếp ảnh gia sử dụng hằng ngày, những bạn muốn lưu lại những khoảnh khắc kèm theo chất lượng hình ảnh được đảm bảo. Khả năng lấy nét tự động nhanh và chính xác tạo nên sự lý tưởng cho việc chụp các sự kiện ngoại cảnh, thể thao và phong cảnh. Khoảnh cách lấy nét tối thiểu 0.35m tạo sự hợp lý cho nhiếp ảnh đường phố, chân dung và tập trung sát chủ thể. TIN TỨC MỚI NHẤTThe Samyang AF 35mm f2.8 FE lens is Samyang’s latest Auto Focus lens for Sony FE mount, usable on Sony Full frame and APS-C (crop) cameras. You can read my full review on this lens here http://gippslandimages.com.au/samyang-af-35mm-f2-8-lens-review/ for this review/test I will focus on it’s ability for Astrophotography. Wide field Astro photography is something I really enjoy, so much so I created an Australian Facebook community for those interested in the same, Nightscape Photographers Australia https://www.facebook.com/groups/nightscapephotographersaustralia/ Naturally one of the first questions I was asked in regards to the Samyang AF 35mm f2.8 FE lens was how does it perform when photographing the stars. A few nights ago I was lucky enough to get some clear skies so headed out with the Samyang AF 35mm f2.8 FE to do a little bit of testing, here are the results. All images in this test are taken using the Sony a6500 and Samyang AF 35mm f2.8 FE lens, results may be different when using Sony’s full frame mirrorless cameras. The above image is Un-edited straight out of camera taken with the Samyang AF 35mm f2.8 FE and Sony a6500 mounted on my Skywatcher Star Adventurer mini eq mount, settings 35mm, f2.8, 30sec, iso3200. The next few examples are 100% crops from this image. Above, 100% crop from the centre of the first image. Above, 100% crop from the top left hand side corner, tiny amount of coma visible in the larger stars. Above, 100% from the bottom Right hand side of the first image, pretty good with pretty much no coma. Above, again a 100% crop from the bottom right hand corner, this time with a tiny bit of de fringing in Lightroom. From these examples you can see that although there is a small amount of coma it is minimal. The Samyang AF 35mm f2.8 FE performs really well as far as coma is concerned. In the examples we can also see a small amount of purple fringing, again not an issue but in the interest of this test I added a very small amount of de fringing in Lightroom to the last image to show how easily it is removed. Above image was taken straight off my tripod and is 7 seperate images aligned and stacked in photoshop, setting for each image 35mm, f2.8, 8sec, iso6400. I took images with the Samyang AF 35mm f2.8 FE lens both on my Star Adventurer tracking mount and directly off my Benro Travel Angel tripod, static, with no tracking. The reason for this is I wanted to demonstrate what can be easily done with this lens when the camera and lens is simply mounted on a tripod with no tracking. Sticking to the 500 rule I was able to use a shutter speed of 8 seconds without trailing, because this lens has an f2.8 aperture I was able to gather enough light and detail in the milkyway with the 8second exposure without having to go too high with iso, my final settings were 35mm, f2.8, 8sec, iso6400. I took seven images one after another with these settings, once home I used photoshop to auto align and stack these images to help reduce noise and bring out detail, with a little bit of tweaking I was able to achieve the image above. Above image 15 stacked frames, 35mm, f2.8, 20sec, iso3200 Above is an image taken using my star adventurer tracking mount, this time I shot 15 images with a longer exposure and lower iso, again aligning and stacking in photoshop, this has made for a cleaner image with a bit more detail. Fogging One thing I noticed and felt it was worth mentioning was the Samyang AF 35mm f2.8 FE lens seems quite resistant to fogging of the front lens element. I shot these images and more, about an hours shooting in total without the lens fogging up, the camera and tripod had quite a bit of dew on them and there was a bit of fog around, but the lens stayed clear. Conclusion As you can see from the examples the Samyang AF 35mm f2.8 FE performs quite well when it comes to astro photography with low coma and a bit of resistance to fogging. Full review on this lens can be found here http://gippslandimages.com.au/samyang-af-35mm-f2-8-lens-review/ Related links Basic night sky photography Nightscape Photographer social media Feel free to like, comment, subscribe and share this on social media. Your support goes a long way with organising future, reviews, tutorials, guides etc, Thank you. |
