Canon 20D Veiwfinder(Mirror) Problem‍

[Mojtaba-N]

با سلام

من يك Canon 20 با لنز 55-18 خريداري كرده‌ام امروز كه دقت كردم در چشمي نقاط ريز سياه رنگي به صورت يك دست تمام صفحه چشمي را پوشانده كه با زوم كردن اين نقاط تراكمشان كمتر ميشود.
كه به نظر اين نقاط روي آينه تشكيل شده‌اند و مشكلي كه ايجاد مي‌كنند در هنگام عكاسي از نزديك در نور معمولي اين نقاط مانع از اين ميشوند كه ببينم كجا فوكوس شده است.

آيا مشكل از دوربين است يا از لنز؟

[mahdi1358]

با لنز ديگه اي امتحان كرديد.؟

[Mojtaba-N]

با تشكر از تمامي دوستاني كه مرا دراين زمينه راهنمايي كردند :confused:
براي دوستان علاقه مند متن زير را بخوانيد. با عرض پوزش وقت ترجمه كردن نداشتم.

Viewfinder Canon's 1-series digital SLR cameras have sharp, clear, colour-cast free viewfinders. They're wonderful. By comparison, the 10D's viewfinder image is somewhat flat and a bit fuzzy to look through, especially if one's eye isn't carefully aligned with the centre of the eyepiece. This is typical of most cameras in the 10D's class in our experience, and it makes it more difficult to see the focus snap in when manual focusing. The 20D viewfinder and its New Precision Matte Screen add up to a clearer, sharper image that's closer in quality to 1-series digital SLRs than the 10D, though the size of the viewfinder image is still about the same as the 10D.

There is one quirk worth noting: when looking through lenses whose maximum aperture is slower than about f/4, a faint graininess appears across the viewing area. With an f/5.6 lens attached, the effect is fairly obvious. The 10D, by comparison, doesn't exhibit a similar graininess with slower aperture lenses. The graininess, while odd, isn't enough to make us prefer the 10D's viewfinder by any means, and the effect is completely absent from the 20D's viewfinder with f/2.8 glass. But the effect is odd nonetheless.