My usual SLR is 100D. I bought the 40MM 2.8 STM as a hanging head very early. It was a very compact camera. This white model was bought for 500 yuan. My friends said it was cheap. The quality of the lens is really good, and the aperture of 2.8 is still practical. It is enough for me, but it can't be used for anything.
â–¼ The thinnest 40MMF2.8 should Pentax this lens, like a lens cap. However, many places in the market are out of stock, prices are also rising, but fortunately I am not a Pentax party.
Pentax/Pentax HD DA 40mm f/2.8 40 2.8 Fixed-focus lens Genuine State Bank Bao Shunfeng 2136 yuan Lynx Select Direct link 
Canon EF 40mm f/2.8 STM standard fixed lens 949 yuan suitable for girls' portable camera Jingdong direct link View Encyclopedia â–¼ However, China moves to send out purchase coupons for charging 300 yuan 200 coupons. Of course, I replaced the ticket voucher with a Tmall coupon with a higher gold content. Only three months of validity, I want to think about what to buy, for fear of forgetting and then expire. (When will China Unicom be able to do this to old customers?)
I want to choose what I don't have. I also like the 10-18MM STM and 24MM STM lenses. But the price is best between 200 and 500, so as to reflect the value of shopping vouchers. In the end, the 50MM 1.8 STM was chosen because it is the most expensive original classic lens, or simply the head (or human). (I used the domestically-produced lens, large volume, the lens motor sounds loud, and the focus is slow)
â–¼ Use shop coupons minus 5 yuan, 650 yuan. Plus 200 Tmall coupons are 450 yuan. (Sure enough, no accessories were sent)
Canon EF 50mm f/1.8 STM Lens SLR Standard 50 1.8 F1.8 Portrait STM655 Tmall Select Direct Link [Appearance and size] â–¼ years ago other courier stopped, the seller sent SF, arrived the next day after delivery, but I did not sign. Packaging is also possible, anyway, no pressure deformation. Use the phone's NFC to touch the box's security label and say it's genuine.
Stepping motors are cheap and easy to use. Canon wants to replace the low-end lens with an STM motor. All Canon cameras are STM motors. This shot was updated in 2015 and is available later than 40MM. As always, the shots are black and grey boxes and nothing changes.
â–¼ 40MM and 50MM origin is Malaysia. Feeling, 40MM work better. 40MM uses 52MM filter, 50MM uses 49MM filter, both lenses are not equipped with a hood.
â–¼ are metal butts.
â–¼ The height contrast of the two lenses. In fact, the Canon 50MM STM is quite compact, but the 40MM STM is smaller.
â–¼ Canon's 50MM STM may be the smallest AFM 50mm lens in the APS-C SLR and anti-camera. Compared to the Nikon Silent Wave 50MM 1.8G, the volume is still small and compact, but the workmanship is still 50MM STM handicap.
I also have a Canon 22MM STM idle lens, added into this echelon, 22MM is a little thicker than 40MM. Although 22MM is APS-C format, it is 2.0 aperture, so thick is normal.
â–¼40MM really can not account for what size, can be packed into a lot of bags (micro single package).
â–¼50MM, obviously occupying the volume
I have more vegetables and I can't find any good themes. The weather has not been good anymore. Take some photos to make a simple comparison.
â–¼ The same position, the same parameter, 10MM's perspective gap is quite large.
â–¼ Measure their closest focusing distance (macro). Both focus on the middle of the leaf. The closest focusing distance between them seems to be 30MM, so the 50MM magnification will be higher.
â–¼ can not find beautiful MM, to find my friend - fat handsome guy, and the camera are in the same position, AV files, use the maximum aperture. The first 40MM, the second with 50MM no sun drying, so the color of the two photos is a bit different.
â–¼50MM 1.8 aperture is much more powerful blur, but I do not feel like creamy open.
The same 50MM lens, close-up portraits, with 1.8 aperture, really not suitable, a little virtual ears.
[Comparison summary]Volume: 40MM volume advantage or obvious
Perspective: 10MM difference, quite different
Focus: Like the STM, focusing is as quiet and fast.
Aperture: The 50mm light quantity is more than doubled, with obvious advantages.
Price: very close, are between 500-700, are very cheap.
If you have 50MM, then do not buy 40MM, 10MM gap is not big, buy buy 24MM. If you first have 40MM, you also want a large aperture, you can buy 50MM, anyway, it is really cheap (compared with other camera brands).
Since I have 40MM and 50MM, my main force is still 40MM and it is changed to 50MM at night. There should be a lot of people like me, like to use a fixed focus hook does not like to change lenses.
And then summed up in a sentence: Well, Canon's lens is very good, almost on the CMOS.
Used Wastewater Treatment Equipment , Rectifier Sewage Treatment Power Supply,Environmental Treatment Power Supply,Waste Water Treatment Power Supply
Shaoxing Chengtian Electronic Co., Ltd. , https://www.ctnelectronicpower.com