In the middle of the focal range the number of vignetting problems diminishes. Further stopping down doesn’t make it decrease any lower. By f/5.6 the situation is even better because the vignetting reaches 13% (-0.42 EV). If you stop down the aperture to f/4.0 the problem becomes just moderate, decreasing to 18% (-0.59 EV). Apart from that you don’t have to tackle a level of 3 EV vignetting there – we are going to present more detail it in a moment.Īs we already announced the description of the performance on a smaller sensor, let’s check how the Tokina 11-16 mm fares on the Canon 50D.Īpplying 11 mm focal length and the maximum relative aperture you must take into account a vignetting level of 33% (-1.17 EV). It is really a lot but the same Tokina, attached as it should to a body with an APS-C sensor, provides 102 degrees at 11 mm. At 16 mm the situation is significantly better – there you get an angle of view of 107 degrees. At 15 mm and on full frame the edges are dark and of very low quality. Is it important, though? In my opinion – not really. It is evident that at 15-16 mm focal length the Tokina can be used with a full frame camera. By f/5.6 the vignetting gets to -1.35 EV and by f/8.0 it approaches -1.1 EV. The 16 mm focal length already features more sensible vignetting levels: at the maximum relative aperture this aberration reaches -3 EV and it decreases to -2 EV on stopping down to f/4.0. The funds are going to be used for paying our editorial team, renting servers, and equipping our testing studio only that way we will be able to continue providing you interesting content for free. If you enjoy our reviews and articles, and you want us to continue our work please, support our website by donating through PayPal. By f/2.8 it still reaches a huge value of almost -6 EV, by f/4.0 you get a result of -4.2 EV, by f/5.6 it amounts to -3 EV and by f/8.0 it gets to already sensible -2.2 EV. Here the image circle is bigger than the sensor and the vignetting decreases with the increase of the aperture. If you use those focal lengths, the corners of the frame will be black, no matter what aperture. We decided to try it as well – the results can be seen below.Īs you can notice the image circle of the lens is too small to cover a full frame detector in the range from 11 to 14 mm. The Tokina 11-16 mm is a lens designed for small sensors but it doesn’t mean it can’t be attached to full frame cameras. You can change your consents to the use of cookies at any given time.Ī small experiment at the beginning of this chapter. In this document you can find more information concerning browser settings and the way we and our social network, advertising and analytics partners process your data. If you fail to do so you should be aware that we are going to process your data according to our Privacy Policy. You can switch cookies off by adjusting your browser settings so if you donât agree with our cookie policy please, change your browser settings or leave our website. Our partners might combine information, obtained on this site, with other data they get from you as you make use of their services while surfing the internet. Information about your browsing habits is shared with our social network, advertising and analytics partners. As in the case of almost all other websites, cookies help us to personalize ads, offering you the most relevant information, allow you to share pages with social networks, make our services work as you expect and, overall, help us to monitor and improve our performance.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |