Lens fix 50mm AF, MF mời vô

[binhnt21]

Mình thích thẩm các lens 50mm, mời các bác giới thiệu lens và ảnh tiêu cự 50mm.

DFA50 f2.8 macro

FA50 f1.4

Đã có những trận đấu như thế này của các lens normal




Đánh giá các lens 50mm của Pentax (st)

f1.2

Both, K50/1.2 and A50/1.2, share the same optical formula, are optically excellent, have high resolution, good saturation, excellent color rendition, and great bokeh. The difference between K50/1.2 and A50/1.2 is the number of aperture blades; A50/1.2 has 9 blades and K50/1.2 has 8 blades. This results in slightly better bokeh and flare control in the "A" version.
It's also been said that 50/1.2 is a little soft wide open especially in the corners. Stopped down, A50/1.2 is an excellent performer at f/8-11 with very high resolution and very good visual sharpness. Its visual sharpness at f/8-11 seems comparable to K55/1.8, (A50/1.2 is better than the K55/1.8 wider than f/8, and similar from f/8 and narrower. However, keep in mind that for high-contrast resolution the "el cheapo" A50/2 virtually matches, stop-by-stop, the A50/1.2 (and beats the K50/1.2), from f/2 to f/22.).
The A and K50/1.2's really are nice to use for their focusing ease, and in dim light they may be the only lenses that can do the job at all, but you certainly don't get much "bang-per-buck" while using them under average light conditions.

f1.4

Very useful, high quality, normal lenses. There are two different optical designs in Pentax 50/1.4 lenses; one is "K" and "M", the other is "A", "F" and "FA". A version is thought to be slightly better than the M(K) version in terms of corner resolution and image uniformity all over the frame.
The A50/1.4 is a great all-around performer. Go for A50/1.4 instead of M50/1.4 if you consider buying a MF lens. Pentax slightly changed its optical design when A50/1.4 was introduced. A50/1.4 is optically superior to M50/1.4
FA 50/1.4 is said to feature good resolution, great color rendition, natural bokeh, and decent MF capability.

f1.7

Both M and A50/1.7 are somewhat legendary in their performance, but it's been suggested that their superiority over f1.4 versions is only marginal.
Comparing f1.4 to f1.7, FA50/1.7 seems visually a bit sharper than FA50/1.4, but FA50/1.4 seems more delicate/refined especially in colors. FA50/1.7 has a slightly better feel over the F version. Its focus ring has more of a rubber feel, while the F has more of a ribbed hard plastic feel to it. The damping and build quality also seems to be slightly better on the FA version. Optically, these lenses are identical

f2.0

There's no K50/2.
M50/2 is not as sharp or as contrasty as the A50/2.
A50/2 is the best bang-for-the-buck K-mount normal lens: sharp, contrasty, and "dirt" cheap. In resolution, the A 50/2 seems to be only very slightly behind the A50/1.7

50mm Macro

M50/4 Macro is good macro lens that can also double as a slow normal one that focuses from macro range all the way to infinity.
A50/2.8 Macro is sharp, light, has a very nice feel to it. It's also very useful as a slow normal lens.
F50/2.8 Macro is sharper than the A version and the M50/4 Macro, but the focusing ring feels awful in manual focus mode. FA version has the same optical formula as the F version.

Thông số của các lens 50mm:
http://www.pbase.com/steephill/standards

[kicker06]

Góp cái dải tiêu cự này cái nhỉ, đóng góp cho nhà pen

Pentax K 50f1,2



Hình từ em nó, f1,2, iso 160, 1/800s

[amateur_2611]

Em xin góp một tấm từ SMC-M 50/1.7

[kicker06]

Cosina 55f1,2



Hình từ e nó cũng f1,2, iso 160, 1/800s

[tanphat]

em thích ảnh của con Cosina này hơn con Pentax áh, để vài bữa rãnh rỗi úp lên vài tấm với M 50 nhé (2 con 1.4 và 1 con 1.7), nay bận quá trời :D

[banhmitrung]

He he he, tuy em nó không phải 50 nhưng cũng cùng họ 55.

DA*55/1.4, ảnh JPG gốc chưa hề retouch

[thanh_tan]

cái cốc kem cuối của bác banhmitrung đẹp quá, em chưa ăn sáng nhìn đau hết cả bụng

[Breakaway]

em cũng góp vui với các cụ tý :D
Nikon MF 50 f2 AI (ảnh con 50 này em lấy trên mạng thôi, con của em đẹp hơn thế này nhiều :P )


đây là ảnh thực tế của em nó :D

[banhmitrung]

Bác Breakaway bỏ lens Nikon vào box Pentax để làm gì thế ạ

[chipvn]

Hình của bác Banhmitrung đẹp quá. Cho em tham gia với cái ống ngàm K đời cổ gần như nhất ạ: SMC K50/1.4. Em này chẳng nét mấy (tại 1.4 thì vô cùng soft) nhưng em thấy màu và bokeh cũng hay hay. :-)

Ảnh xuất thẳng bằng JPEG của K-x

@ F2.8:



@ F4: (crop)



@ F4: (crop)



@ F7.1: