[yausw812]

其實 f1.4 and f1.8 差幾遠 ?

因為50mm f1.4 = $25xx
85mm f1.8 = $26xx

只是用黎影人, 建議買邊支好呢 ?


順便問一問, 其實又係光圈問題

小小白跟小白比較
他們的分野值唔值比多幾千蚊買 ?

[genewch]

I think if you are using 1.6x crop factor cameras, the 50mm f1.4 might be better. The 85mm is more suitable for half-body portraits. Both are very good lenses with great value.

The 1-stop aperture difference sometimes gives a large difference. Technically, it's related to the difficulty in manufacturing. For the mini little white, the largest effective aperture is 200/4=50mm, while the little white is 200/2.8 = 71mm. Then you have to make larger glass lenses. In dim light, a wider aperture surely is more favourable, but I can't tell whether the $4000 difference is worthwhile.

[yausw812]

Thanks for your reply !!!

I think i probably buy one 85 mm f1.8, since i like to take half-body portraits...

and i want to know what is the largest effective aperture ??

[calvinhung]

如果買85mm/1.8,咁我就寧願買tamron 90mm/1:1了!
呢支tamron 90mm真係好sharp!又輕便!就算開盡2.8光圈都ok,而且係1:1marco,影埋花花草草都得嘛!

[calvinhung]

如果買85mm/1.8,咁我就寧願買tamron 90mm/1:1了!
呢支tamron 90mm真係好sharp!又輕便!就算開盡2.8光圈都ok,而且係1:1marco,影埋花花草草都得嘛!

[yausw812]

乜唔係..影人像唔好用marco鏡咩?

聽人講..用marco鏡影人會影得冇咁好...

[darrens]

Tamron暗位對焦唔得ga wor....對焦對到投降都似
Canon 85 f1.8, 否則Canon EF-S 60 f2.8 macro/EF100 macro f2.8 USM la