Keep my Canon EF-S 15-85 or buy RF 18-150?

pcassel wrote:

cargani wrote:

I'm an amateur, about to buy Canon R10 to replace my 60D.

I own a couple of low quality EF lenses, as well as a Canon EF-S 15-85, and intend to buy an ES-R adaptor, but I'm temped to buy an R lens solely for weight consideration.

I wonder if the drawbacks of transitioning to RF lens (the expense, loss of wide angle, quality?) worth the weight and extra zoom benefit?

Thanks!

I got the 18-150 as part of my R7 kit. I like it much more than I anticipated I would. I was troubled by the lack of wide so following advice here, I also purchased the EF-S 10-22 for a dirt cheap price at one of the famous used dealers. I consider my short and mid-long range now fully covered.

I have both the EF-S 15-85 and the RF18-150. I got the RF18-150 with the R7 to get quick delivery of the R7. I had low expectations for the R18-150 and did expect I would do any thing but sell it after I saw how well it worked.

It came as a surprise for me that both lenses can be used to make great images. The EF-S 15-85 with RF adapters is bigger and heavier though. I did not realize how I felt about the EF-S 15-85 until used it side by side with other lens. After the EF-S has more coverage at the low end and the 15-18mm FL range is very important I thought. Then I shot some chart tests of the two lenses side by side. Both of the lenses wide open at 18mm were soft in corners. This was much softer than at 18mm!! The EF-S was worse in the corners at 18mm!!! Stopping down only helped the corners a little. I liked the RF18-150 much more over the 18-86 range covered by the EF-S 15-85. My copy of the EF-S wide open at 15mm was even softer in the corners!! I fell out of love with the EF-S beginning. The soft corners wide open at the 15-24 mm range, the large size and more weight sold me on making the RF18-150mm my preferred walkaround lens.

If your budget can afford on I recommend the RF-S 18-150. I have been very please with the performance and I have not used the EF-S lens on the R7 beyond these comparison tests. I love the low weight and better corner performance at 18mm. It sits on the shelf and I probably will sell it. I used to use it with the 70D but the R7 in my main APS-C sensor camera now.

Because the 18-150 is not wide enough for me. I should note that recent bought the EF-S 10-18mm lens for wide angle use. This lens was very inexpensive (used) and it is small and light with pretty nice IQ. I happy using this adapted EF-S 10-18 along with the RF-S 18-150mm. The FL range coverage is very nice.