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Wide-Angle
Good Wide Angle For Occasional Shots
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<blockquote data-quote="westmill" data-source="post: 55326" data-attributes="member: 9330"><p>Oops ! sorry lol</p><p>errrr yes to VC being tamron version of VR and no Its the none VR version you want <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big grin :D" loading="lazy" data-shortname=":D" /></p><p></p><p>It seems, while adding there VC they messed up. The none VC version is opticaly superior.</p><p>Best of all its even cheaper lol. Feild curvature is common in wide angle lenses which is why i bought up</p><p>the fact the 18-70 is excellent. You cant correct it though. This is not barrel distortion or pincushion distortion.</p><p>mmmmm how to explain lol.... I will try.... OK... when you focus a lens at a set distance... you assume that anything</p><p>at the same distance will also be in focus. If you have a lens suffering from feild curvature it means the focus point</p><p>changes in the lens towards the edges. If you set a load of people in an arc and focussed in the middle they would</p><p>all be sharp. If they were in a straight line, those at the end would be out of focus. Shutting the lens down reduces it</p><p>slightly as does the natural effect of more DOF when shutting down. Its genraly said its not that important unless</p><p>you are producing flat copy work, but it certainly has an efect if its severe. It doesnt bother me too much, since i can</p><p>genraly stop down to F8 anyway. Its just worth knowing if your after top results. Its only at the 17mm setting this is a problem. Its still an impressively sharp lens. I would also add...the Differance in image quality between the VC version</p><p>and none VC is actualy quite big. The none VC is far finer detailed throughout.</p><p>Since ive gone this far lol... Ive seen testers testing this lens without knowing about the feild curvature at the wide setting, and as a consequnce report it sometimes struggles to focus. It will focus fine and fast when single points are used.</p><p>When you have 50 focus points it naturaly cant agree where to focus.</p><p>I stress though, this is just at the wide 17mm setting. Other than that, it sets standards for sharpnes in this class. Its a great lens !</p><p>for the rest of the time its fast and perfect. </p><p>its like anything else. know your equipment to get the best out of it.</p></blockquote><p></p>
[QUOTE="westmill, post: 55326, member: 9330"] Oops ! sorry lol errrr yes to VC being tamron version of VR and no Its the none VR version you want :D It seems, while adding there VC they messed up. The none VC version is opticaly superior. Best of all its even cheaper lol. Feild curvature is common in wide angle lenses which is why i bought up the fact the 18-70 is excellent. You cant correct it though. This is not barrel distortion or pincushion distortion. mmmmm how to explain lol.... I will try.... OK... when you focus a lens at a set distance... you assume that anything at the same distance will also be in focus. If you have a lens suffering from feild curvature it means the focus point changes in the lens towards the edges. If you set a load of people in an arc and focussed in the middle they would all be sharp. If they were in a straight line, those at the end would be out of focus. Shutting the lens down reduces it slightly as does the natural effect of more DOF when shutting down. Its genraly said its not that important unless you are producing flat copy work, but it certainly has an efect if its severe. It doesnt bother me too much, since i can genraly stop down to F8 anyway. Its just worth knowing if your after top results. Its only at the 17mm setting this is a problem. Its still an impressively sharp lens. I would also add...the Differance in image quality between the VC version and none VC is actualy quite big. The none VC is far finer detailed throughout. Since ive gone this far lol... Ive seen testers testing this lens without knowing about the feild curvature at the wide setting, and as a consequnce report it sometimes struggles to focus. It will focus fine and fast when single points are used. When you have 50 focus points it naturaly cant agree where to focus. I stress though, this is just at the wide 17mm setting. Other than that, it sets standards for sharpnes in this class. Its a great lens ! for the rest of the time its fast and perfect. its like anything else. know your equipment to get the best out of it. [/QUOTE]
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Good Wide Angle For Occasional Shots
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