| inviato il 04 Gennaio 2017 ore 13:16
Questo "problema" ce l'ha anche il yongnuo 35 f/2, a mirino si vede, e quando compare a volte è sufficiente mettere la mano sopra per fare ombra alla lente 
Anche la però non avevo il paraluce, spesso questi problemi li risolve egregiamente |
| inviato il 04 Gennaio 2017 ore 13:26
Qualche info:
en.wikipedia.org/wiki/Canon_EF_28%E2%80%9380mm_lens
"The first iteration of the f/3.5–5.6 ("USM" in the chart below) non-L lens is identified by the metal mounting ring and DoF window. The initial USM version, while much smaller and lighter in weight than the L version, is considerably larger and heavier than later versions due to the internal optics and the use of larger but quieter and faster ring motor USM. Production of the first version ended in (approximately) 1995. This lens is unique in the 28–80 mm f/3.5–5.6 series.
USM versions II through V deleted the DoF window and are considerably lighter in weight and smaller in diameter. They retain the USM feature albeit with a lower-cost, slower but more compact micro-motor version. They share more in appearance with their non-USM siblings, as the body shape and weight are more like the non-USM than the first USM version. The USM II through V versions also incorporate a plastic lens mount.
All USM lenses (including the L version) support full-time manual focusing (FTM), which allows the user to override autofocus simply by turning the focus ring. The USM (ring motor or micromotor) feature is signified by the gold "Ultrasonic Motor" text wrapped around the barrel of the lens on non-L versions. The original lens cap also says "Ultrasonic" although caution is advised as lens caps are often swapped and should not be counted upon as indicative of the actual lens' features.
Lower cost non-USM versions ("Original" and "II" in the chart below) were produced as well. A lower-cost drive system replaced the USM auto-focus system and therefore these lenses do not support FTM. AF action is considerably slower and noisier than USM versions. Lenses such as these without FTM focusing can be damaged if the focus ring is turned by hand while the lens is in the AF mode. Like the USM II-V versions, these non-USM versions have a plastic mounting ring and delete the DoF window.
All variants of the non-L 28–80 mm lens were included at times as kit lenses."
contrastly.com/old-inexpensive-sharp-canon/ (la foto del 28-80 USM però è sbagliata, mostrando un 28-80 versione II-IV)
"This lens is probably the highlight of this post. It's simply a stellar lens which is usually sold for under $100. Now, Canon produced many different models of 28-80 kit lenses. This one was the first, and the best. Each time they released a new one, the quality slowly went down. This is the one with the USM design and the metal mount.
Anyway, now about this lens. As I said, it's a quality piece of glass. The image quality is very nice, and the build quality is simply unparalleled at its current price range. It has a nice metal mount, focus distance window, and nice focus and zoom rings. Here's the kicker though: it features the fast USM ultrasonic autofocus motor. This is ring-type USM (there are other types, but ring-type is the best. Other 28-80 lenses have USM, but it's not the ring-type like this lens has) . AF is fast and snappy. If you need a general walk-around zoom lens on a tight budget, you simply can't beat this lens. It also makes a great backup for a newer zoom lens.
It is a discontinued model, which means you'll have to find a used one. However, this is good for you, because it'll be much cheaper than your average new lens. Many people have started to notice the quality of the Canon 28-80 USM, which has caused the price to go up slightly. But the average used price on eBay currently seems to be between $50 and $100, which is a steal. Definitely a good option for a general zoom lens."
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| inviato il 07 Gennaio 2017 ore 12:56
Bella foto, son contento che tu la stia sfruttando meglio di me, questa lente. E sì, da il suo meglio nei ritratti, probabilmente proprio per la resa dei colori. |
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