How to use Pentax lenses

Introduction to Pentax lenses

Author: Wuji Senior Jiang Laohu

DA14mm/2.8

The designer is the most famous PENTAX Jun Hirakawa.

This lens is for half-frame cameras, not full-frame lenses. The price is around 3,500. China is the cheapest in the world. This is relatively rare. At least it's cheaper than the United States and Japan.

This lens is very common in the eyes of domestic P fans. It does not have an AL aspherical lens, but uses high-folding glass and ED lenses to correct the distortion caused by wide angle. It is said that it is imitated by Leica's m19/ 2.8. But it is indeed very rare among Japanese lens manufacturers. The minimum focusing distance is very close, only 0.17m, which means you can shoot close to the object. The bright and large aperture of 2.8 is very cool.

DA15mm/4 Limited

This lens has a suffix. What does Limited mean? It is a proper noun of PENTAX, called limited edition. It actually refers to the monthly production limit. It doesn’t really mean limited edition.

The designer of this mirror is Jin Zhixiong Kang. He is also a very popular designer in the P family and has his own unique insights mainly in wide-angle lenses.

This lens uses AL aspherical lenses. The aperture is also very small. Many people will laugh at P, because even F4 is called a large aperture.

But the biggest advantage of this mirror is its compactness. Since it is a Limited, another feature of the Limited is its compactness. P is originally known for its compactness, and its philosophy is that small is beautiful. With a total length of no more than 5 centimeters and a filter diameter of no more than 49mm, who would have thought it was a wide-angle lens?

With such a low-key appearance, the quality is naturally not bad. In laboratory evaluation, the center resolution is off the charts, exceeding the limit of the resolution target.

Small size + high quality = high value

The current price of this mirror is over 4,000 knives. However, it is relatively cheap in the United States. If you have a friend who wants to buy this lens, you may want to ask a friend to buy it for you, as long as you can go through customs.

DA21/3.2 Limited

Designer: Jun Hirakawa

As a wide-angle lens, in today’s world where aspherical lenses are widely used, this lens actually uses symmetry structure. The picture quality is guaranteed when fully opened, and the biggest advantage of the symmetrical design is small distortion and uniform picture quality.

As a Limited, this lens is naturally very compact. As one of Pentax’s three representative cookies, you can imagine its size, and the very distinctive hood will make you feel low-key and luxurious.

Compared to 15, its price is about 2,700.

FA31/1.8 Limited (Little Princess)

A careful observer will find that the name of this lens is a bit strange. Why is it called FA? FA is the prefix of P lens in the film automatic era. , indicating that this mirror is a full-frame mirror.

Designers: Kim Chi Yuyasu, Ito Takaharu

Looking at P’s lenses, none of them have the magic and weird focal length of this lens. Designed by two people, what’s going on, we It will be mentioned later.

Let’s talk about the 31 next. Jun Hirakawa was the designer of this lens in the early days. In fact, Hirakawa designed the 31 based on the ideas of the 21. The maximum aperture could only be 2.4. The boss quit and dismissed Hirakawa. Change to another team and start again. That’s why we have the large aperture of 1.8 we saw today, but the price is that this Limited’s caliber is 58mm.

The C family has 35L, the N family has 35G, and the S family also has 35G, all with 1.4 specifications, and P seems to have only a 1.8 aperture at this focal length, but it is true that P regards it as the same as these 1.4 cameras. Make a level.

P uses ground aspherical lenses in this lens. This is the highest-end AL lens. In terms of design, P uses its own free design, which means that the rear group does not move and the front group focuses. technology to correct the problem of image quality degradation when taking close-up shots.

As for the bokeh, the bokeh of the 31Lim is comparable to or even better than that of the C 35L. There is public opinion on this point. Both the other side and Japan think so. This is almost the best Japanese 35 focal length camera.

DA35/2.8 Macro Limited

Designer: Hiroshi Kato or Oyasu Kaneshiro

Before Sony’s 30 micro appeared, this was almost 35 It is the only macro lens in the focal range. Lim's workmanship and small diameter will definitely make people addicted to it. Some people call it the best lens for photographing food. The suitable focal length and low-key lens body are really good.

DA35/2.4

Designer: Unknown, but judging from the published structure diagram, it comes from Takayuki Izumi, who is currently the head of Nikon’s second design department and switched jobs from Pentax to Nikon.

The reverse telephoto design of 6 elements and 5 groups is quite satisfactory.

The center resolution is extremely high, and it is close to bursting when fully opened. In order to be cheap, P changed the butt to plastic. It is said that there are 12 colors for sale in Japan. But haven't seen it yet.

Last year, the group purchase on Zhuomei.com cost 999 yuan, which was very worth it.

Compared with the N's 351.8G, the center resolution is slightly better, and the price is more approachable than the 3518G, but the aperture is smaller. It is said that the hair color of this mirror is extremely rich. Wuji's CAPSS senior said it might be the reason for the SP coating.

DA40/2.8 Limited

Designer: Jun Hirakawa

In fact, the origin of this mirror comes from Pentax designer Yasuo Takahashi in 1978.

Hirakawa modified the curvature of the first and last pieces of glass, so that the closest focus changed from 0.63m to 0.4m

The Sonnar structure of 5 pieces and 4 groups came from 1903 The Tiansai structure of Zeiss engineers is 4 elements in 3 groups. After adding a lens, the inherent focus drift phenomenon of Tiansai is corrected.

This is currently the smallest SLR lens in the world, with a total length of 15 mm and a weight of 90 grams.

If it is installed on the fuselage, even the inner flashing canopy cannot come out, as if it is not installed at all.

Small and very portable.

FA43/1.9 Limited (Princess)

Designer: Jun Hirakawa

I don’t know if the judges are tired, but I am very good at typing. Tired, I Googled Jun Hirakawa a few days ago and saw that this person was the best optical designer in 2009. It was 2008, when this Japanese man was 46 years old.

43 is also called the Big Princess and was released in 1997, when Pingchuan was 35 years old.

This lens has too many features. To put it simply, it has a strong center when fully opened and soft corners. But after receiving the 2.8, it exploded.

Personal pronouns are the standard among Japanese standard mirrors, which give people a sense of "enlightenment".

FA50/1.4

Speaking of 5014, we also mention PENTAX. In 1965, P improved its own 55/1.8 double-Gauss structure lens of 1959 and absorbed some of Schneider’s ideas. Experience, applied for the optical structure of modern 5014. Since then, each company’s 50 1.4 has fully quoted this patent

DA☆55/1.4

Designer: Jun Hirakawa

This was Pingchuan’s last lens in P, because not long after this lens was released, Tag Heuer fired Pingchuan.

Pingchuan, who was forced to be laid off early, was 48 years old.

I wonder if anyone has asked him to resume work.

Because P does not have full frame, P designed this lens as an 85 head. In addition to using 4 pieces of high-grade high-curved glass, this lens also uses a special aperture for the first time to ensure that the aperture spot formed by all apertures before 2.8 is completely round.

Also, this lens adopts Schneider’s idea of ??considering the low pass in front of the CCD as the rear group of the lens only on the medium format head. There are only a few among the Japanese 135 mirrors!

In addition, this mirror uses Pentax’s latest coating technology, ABC coating (Aero Bright Coating coating), which improves the transmission of light by effectively reducing light reflection in a wider wavelength range, while greatly reducing the impact The generation of imaging glare and ghosting).

As for coating, in 1971, P developed SMC coating and has been leading the industry ever since. In the 1990s, anti-ghost coating was specially designed for the Japanese Police Department to deal with It’s hard to see clearly when taking pictures when using car lights, so friends who use P-mirrors can hardly see the bourgeois glare spots.

The SP coating at the beginning of the new century is oil- and water-repellent. This is a coating only available on high-end mirrors from the C family. P even has it on more than 200 short sets. ABC coating is the patent of HOYA after becoming the shopkeeper. I don’t know if I can take it with me when I marry Ricoh. It is best to hold it jointly.

There is also a ☆ in the name of this lens, which is the logo of Pentax professional lenses, just like Canon's L with a red circle.

Judging from Ricoh’s announcement of updated HD coated lenses, it seems that ABC no longer exists? Or is HD new wine in old bottles?

DA70/2.4 Limited

One of the three biscuits. Designer: Jun Hirakawa

Looks like I am giving a pass to Jun Hirakawa tonight.

6 pieces and 5 groups of Prana structure, it is very good when fully opened, and has many advantages. In the PZ evaluation, it even surpassed the 77 Princess in some places, and the purple edge control is superior! One of the few recommended heads on PZ, the price is approachable, and it is a good portrait head.

FA77/1.8 Limited

Designer: Jun Hirakawa

This lens has a Prana structure of 7 elements and 6 groups.

It has Free design, which is awesome.

Let’s talk about the name of 77 first. Pingchuan likes to eat a kind of cake, and the name has the word "hi" in it. The Japanese word "hi" looks like two 77s, so Pingchuan made this weirdly focused head.

In fact, for this focal length, there are many famous lenses such as the 7514 of France's Ainen, Leica's 7514, 902AA, Contax's 8514, 8512, Canon's 8512, P's own A star 8514, and FA star 8514. , how to show yourself.

I have to mention Jun Hirakawa who gave me the allegation.

Starting now, in 1984, 22-year-old Jun Hirakawa released the A-star 85 1.4. This was the best 8514-spec headset of any era. Because it was designed with free, the full resolution was very good. , better than Contax or Zeiss 8514.

Later on the FA Star 85 1.4 (the famous cup, Star Dance), Hirakawa challenged himself and used 2 pieces of high-bend and low-dispersion glass. This is one of the best materials among the Japanese 85 lenses. One (MINOLTA 85GDL smiles without saying a word), the rear group focuses very quickly, which is very characteristic of the autofocus era.

In 1998, the FA77, the second princess, Pingchuan once again challenged himself and got the Free design. It performed well at full open and was very impressive.

Hirachuan, a Japanese man, is so awesome that Pentax cannot be avoided.

Heuer laid him off. It's a pity, maybe because the talent is exhausted, but you can always bring up new people. Why!

What an evil capitalist system!

DFA100 micro

A mirror that every house has

Also explain the name first. This DFA can be used on the digital terminal of film. It is actually a full-frame mirror. Meaning, in fact, 40 and 70 of them can be played on the full frame.

A100 micro is the best, then F100 micro, then FA100 micro, then DFA 100 micro, then DFA100 micro 2nd generation, this is it. Of course, the head of this all-metal lens body is very It’s beautiful, has a simple and waterproof head, and is very practical. The P’s 100-microfocus range is 330°, which is great, but it means the focusing is not very fast.

The second is DA Star 200/2.8 DA Star 300/4

Basically there is nothing to say, except that 300/4 is the 300mm fixed focal length with the closest focusing distance, and CN The specifications are almost the same. No more verbosity.