ZS20 with Teleconverters, part 2

 


Testing of Teleconverters on the ZS20 at a 30m


I tested the Nikon E15ED (1.5x), Olympus C180 (1.7x), Nikon E17ED (1.7x) and Olympus C210 (1.9x) TCs separately on the ZS20, as well as the stacked E15ED+C180, E15ED+E17ED, and C180+C210. 

I set up the tripod 30m from the power pole as in my testing of the FZ38 with TCs as shown here.


Below are reduced sized images from each test (click on the image for a larger view).  All the full sized 14MP images can be downloaded from my DPR gallery here.


Above: ZS20 at 480mm (equiv.) without any TC


Above: ZS20 at 480mm (equiv.) with Nikon E15ED


Above: ZS20 at 480mm (equiv.) with Olympus C180


Above: ZS20 at 480mm (equiv.) with Nikon E17ED


Above: ZS20 at 480mm (equiv.) with Olympus C210


Above: ZS20 at 480mm (equiv.) with C180 stacked on E15ED


Above: ZS20 at 480mm (equiv.) with E17ED stacked on E15ED


Above: ZS20 at 480mm (equiv.) with C210 stacked on C180



Comparison Crops

I compared 100% crops of these images side-by-side as shown below (click on an image to see the full version.)


Above: no TC compared with each of the single TCs at 100%


Above: stacked TCs compared at 100%



Conclusions


Single Teleconverters

The E17ED provided the best IQ across the entire image, and showed the least CA; this was followed by the E15ED, although this TC gave the lowest magnification, followed by the C180 and finally the C210 which, whilst showing the greatest magnification, also showed the most CA. The C210 was sharp in the centre of the image but sharpness decreased away from the centre and CA increased.


None of the TCs when used alone was able to show detail of the thread on the bolt near the centre of the image, as shown in the crops, although there was a hint of the threads with the E17ED and the C210.  To give an idea of scale, the wooden pole is 30cm in diameter and the head of the threaded bolt shown in the crops is about 15mm across.


Stacked Teleconverters

The best IQ was obtained with the stacked E15ED+E17ED, followed by the E15ED+C180, and finally the C180+C210 which, whilst having the greatest magnification also showed the poorest IQ.


All three of the stacked TC combinations were able to show detail of the thread on the bolt, as seen in the crops. The amount of detail resolved near the centre of the image seemed about the same for the E15ED+E17ED and the C180+C210, but the stacked Nikons were superior towards the edges of the image.


To sum up, it could be concluded that the stacked Nikons provided the best IQ and resolved the greatest amount of detail out of all the TCs tested.


The following section describes some hand-held tests done at a distance of 200m with various teleconverters on the ZS20.



Continue to Testing of Teleconverters on the ZS20 at 200m


Return to Setting Up the ZS20 for Teleconverters