ijm5012
Mu-43 Legend
I recently purchased a Sony DH1758 1.7x teleconverter because I was curious what sort of image quality I could get when putting it on the front of my 35-100 f/2.8. Many people use this teleconverter with the 55-210 zoom lens for the Sony E-Mount system, but I couldn't find any evidence of people using this teleconverter on the Panasonic 35-100. The TC simply screws on to the filter thread of the lens, since it has 58mm filter threads on the rear.
Regarding the below shots, all images were shot on a tripod, OIS off, with the electronic shutter. No adjustments were made, I simply imported the RAW file through Light Room, and saved them as jpegs. Each lens was shot wide open, and then stopped down to f/5.6. For the 35-100 shots without the TC, I repositioned the camera so that it had an equivalent FoV when compared to the images taken with the TC and the 100-300.
As the results show, the addition of the TC to the 35-100 does have some negative effects on the sharpness of the images in the corners, however center sharpness still remains very good. There is also some additional vignetting present, but nothing that is too extreme (I tend to add some vignetting in post anyways, so this isn't a concern for me). What is quite puzzling though is the FoV differences between the 35-100, and the 100-300. The 35-100 with the TC (what should be 170mm) has just about the same FoV as the 100-300 lens set to 108mm. This is very concerning, because it shows that the true telephoto end of the 35-100 is nowhere near the claimed 100mm. At the bottom of the post, I show what the difference in FoV is between the 35-100 at 100mm, and the 100-300 at 100mm, taken with the camera in the same location.
Overall, I think this is a good option for those people looking to add a bit more reach to the 35-100, but don't want to carry an additional lens. I would most likely use a combination like this when shooting motorsports (something where corner sharpness isn't an issue due to blur from panning while shooting). I also don't think this would be an issue unless everything in the photo is on the same focal plane, or if the subject of the photo is positioned in the corner of the frame. I've included all of the photos below, labeled as to what lens was used.
Photos with 35-100 & Teleconverter
View attachment 392650
View attachment 392651
Photos with 100-300
View attachment 392652
View attachment 392653
Photos with 35-100, with the camera repositioned for equivalent FoV
View attachment 392654
View attachment 392651
Comparing 100mm FoV, 35-100 vs 100-300
View attachment 392656
View attachment 392657
Regarding the below shots, all images were shot on a tripod, OIS off, with the electronic shutter. No adjustments were made, I simply imported the RAW file through Light Room, and saved them as jpegs. Each lens was shot wide open, and then stopped down to f/5.6. For the 35-100 shots without the TC, I repositioned the camera so that it had an equivalent FoV when compared to the images taken with the TC and the 100-300.
As the results show, the addition of the TC to the 35-100 does have some negative effects on the sharpness of the images in the corners, however center sharpness still remains very good. There is also some additional vignetting present, but nothing that is too extreme (I tend to add some vignetting in post anyways, so this isn't a concern for me). What is quite puzzling though is the FoV differences between the 35-100, and the 100-300. The 35-100 with the TC (what should be 170mm) has just about the same FoV as the 100-300 lens set to 108mm. This is very concerning, because it shows that the true telephoto end of the 35-100 is nowhere near the claimed 100mm. At the bottom of the post, I show what the difference in FoV is between the 35-100 at 100mm, and the 100-300 at 100mm, taken with the camera in the same location.
Overall, I think this is a good option for those people looking to add a bit more reach to the 35-100, but don't want to carry an additional lens. I would most likely use a combination like this when shooting motorsports (something where corner sharpness isn't an issue due to blur from panning while shooting). I also don't think this would be an issue unless everything in the photo is on the same focal plane, or if the subject of the photo is positioned in the corner of the frame. I've included all of the photos below, labeled as to what lens was used.
Photos with 35-100 & Teleconverter
View attachment 392650
View attachment 392651
Photos with 100-300
View attachment 392652
View attachment 392653
Photos with 35-100, with the camera repositioned for equivalent FoV
View attachment 392654
View attachment 392651
Comparing 100mm FoV, 35-100 vs 100-300
View attachment 392656
View attachment 392657