以下是引用wzc在2007-12-31 22:37:15的发言：早些时候就注意这个mini，结构示意图都打出来了，就是不知道个别部件干啥用的，现在发问：
1.7214是干嘛的？增倍镜？如果是，要这个干嘛？
2.7860装在尾部使用的话配合7501接单反相机能否提供全幅画面的像场，边角是否平场不要求了，估计暗角是一定有了，只求没有黑圈就好。
3.以上示意图，7205的存在觉得只能接aps画幅相机了，调焦座接在接目端再加相机肯定不如接在物镜端顺滑。
这个镜子内部几道光阑？我有高桥摄影标准2寸摄影接筒，长度61mm，加在后端相机能否合焦？另再麻烦黄兄量下7205内径多少?问题实在太多了，多谢！
－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－－
刚又看了兄有尺的那幅图，看来没法合焦，只能上borg的接环了，好费啊！！
Sorry for the long delay, been busy as I've to prepare for work.
1. [7214] is used like a barlow. It magnifies the view by 1.4x. I supposed this is like a high quality teleconverter, something like the AstroPhysic 2" Barlow. As for why there are markings on the extensible lens, i'm not too sure. I tried two settings, one at 300, and the other at 640. Both views are the SAME, but the setup of the 640 requires a longer tube length. There is some instructions, but i do not understand Japanese. I think that if i have a miniBorg 45 (focal 325mm), then i should set the lens at 300 or 350 to achieve 1.4x. If i have a longer focal length scope (maybe a 450mm), then I should set the lens at the 450mm marking.
The picture below shows how the teleconverter [7214] is attached to the MiniBorg using the M57 threads.
The picture below shows the DSLR adapter [7000] and [5005] which can be screwed onto the teleconverter using its M57 thread.
2. I have a Canon 400D, and it is not a full-frame camera. Using my 400D plus the 7860, there are no vignetting at all. I'm not sure if there will be any vignetting when using a full-frame DLSR.
3. I took some pictures using my DSLR, with the [7860] and [7215] and there do not seem to be any problems with vignetting. The DSLR setup which i had posted did cause the helical focuser [7860] not to function smoothly. After attaching [7860] to the lens cell, followed by the rest of the accessories, it was indeed easier to turn the helical focuser. The current setup which i have are all shown in the setups as shown in the pictures.
Below shows the helical focuser in two different positions.
Below shows a picture of the how the [7205] works. It is a drawtube, and is tighten by the two screws at the side. The parts are made very precisely and minimal flexion is observed.
Below shows a picture of the back of the [7205] . It has a M57 thread, which i attach a [7504] to it. The length of extension is 37mm, and the inner diameter of the [7205] is abt 46mm.
The MiniBorg45EDII [6045] does not have any baffles. What it had are the tiny circles which are similar to the inside of the [7205]. With regards to your last question on whether i can achieve focus with 'Tak part', i'm not too sure, as i'm not too clear which Takahashi accessory you are referring to.
I hope the pictures here say a thousand words than my poor description of the answers.
