tc-200

 관측을 나가면 경위대로 사진촬영을 간단히 하면서 돕으로 관측을 한다. 180mm+크롭센서는 오리온자리의 불꽃성운부터 오리온성운을 한화각에 담을 수 있고, 마차부자리 산개성단 3형제(m36,37,38)도 한번에 담을 수 있다. 찍고자 하는 대상을 외롭지 않을 정도로만 당기면서 배경을 만들어주는 좋은 화각인 듯 하다. 플레아데스는 정말 외롭고 이쁘게 찍어주는것 같다. 

 니콘 mf 180mm 2.8ED렌즈는 후드 일체형인것이 만듦새도 좋고 처음써보는 니콘렌즈이면서 갖고 있는 유일한 ED렌즈이기에 두고두고 쓸것같다.

오랜역사의 렌즈

Nikkor short tele-lenses

Nikon produced some very fine lenses with a fixed focal length of about 4 times the focal length of a standard lens. These lenses are very well usable in sports or even theater photography. Especially the fast lenses with their shallow depth-of-field are excellent instruments for ´far close-ups´.

2.8/180 mm.

This birth of this lens has a long history. At the 1936 Olympics in Berlin (Germany) the famous German lens manufacturer Carl Zeiss presented its ´Olympia-Sonnar 2.8/180 mm.´. Photographers all over the world were hilarious about this fast lens. Many competitors had to reply to this public relations act of Nazi-Germany. Fellow lens manufacturer Ernst Leitz countered with its Telyt 2.8/180 mm., later followed by its APO-Telyt-R 3.4/180 mm., APO-Elmarit 2.8/180 mm. and (much later) the APO-Summicron 2/180 mm. Olympus tried to catch up with a 2/180 mm. and the French lens manufacturer Angenieux produced a 2.3/180 mm. even in Nikon F-mount! What about Nikon? We had to wait for Nikon´s answer until November 1953. Nikon introduced a stunning Nikkor-H 2.5/180 mm.! Half a stop faster than the Olympia-Sonnar, but almost 20 years too late. The lens could/can be used on a Nikon rangefinder camera via its reflex housing or on a Nikon F SLR camera via the N-F-tube. In March 1971 the Nikkor-P 2.8/180 mm. was introduced. From the first minute this lens became very popular worldwide. Its 5 elements in 4 groups deliver razor sharp images at any distance at any aperture! The triumphal procession started! Despite the very nice and modern army of Zoom-Nikkors the latest version of this lens has no rivals. It is one of the best optics Nikon has ever produced. In a comparative test in the (pro-)German photo magazine ´Color Foto´ the AF-Nikkor 2.8/180 mm.ED-version gained the third place behind two Leica lenses. Winner was the APO-Summicron, which lens was (at the time of the test) exactly ten times (sic!) expensive as the Nikkor! On a digital DX-camera the Nikkor lens becomes a 2.8/270 mm. tele-lens and with a TC-20 teleconverter the photographer has a 5.6/540 mm. tele-cannon!

Let us see how this lens evolved through the years. The first F-mount lens was introduced in March 1971. It has an optical construction of 5 elements in 4 groups and weights in at 830 gram. In April 1976 the version with improved coating (Nikkor-P.C) was introduced, followed in July 1977 with the 50 gram heavier AI-version. The AIS-version - introduced in October 1981 - has an altered optical construction, consisting of 5 individual elements of which one is a lens of ED-glass (ED = extra dispersion = low breaking index). The new lens design resulted in a 80 gram lower weight. In September 1986 again the lens was redesigned and presented as the first auto focus version. Apart from a new lens barrel (total weight 750 gram) the optical construction has 8 elements in 6 groups, mainly due to the internal focus system. The second element from the front is an ED-element. Only two years later (November 1988) the lens is improved again. Finally in December 1994 the lens is fitted with the D-chip for improved flash photography.

<출처-http://www.nicovandijk.net/>

  

  그렇지만 망원배율은 조금 아쉬워 달을찍으면 화면에 차는 맛이 없어 크롭을 해야하고,  아직 작은 대상은( 아직 찍어보지 못했지만) 작게 찍힐 것이기에 어쩔까 하다가 tc-200 컨버터를 구했다. 배율을 X2 해주는 텔레컨버터로 200미리까지 사용할 수 있다. 렌즈+컨버터+변환어댑터를 끼우니 많이 길어진다. 두배지만 초점맞추기는 제곱으로 힘들어 지겠지.

간단한 테스트샷. 화질이 저하된다는 느낌은 없다.